Pensez à sélectionner votre vehicule pour limiter les resultats de recherche

Engine Parts & Tuning Hardware

Unleash Your Engine's Power: Performance Parts & Accessories

At Optimiz Access, we offer a vast lineup of engine performance parts and accessories to boost the output of your sports vehicle or premium automobile. Optimize your engine for extreme performance and enjoy an exhilarating driving experience on both road and track.

Key benefits of engine tuning: substantial horsepower and torque gains for rapid acceleration, sharper throttle response, enhanced mechanical reliability using high-strength components, and tailored custom tuning suited to all engines.

Essential Products to Maximize Engine Performance

Discover all our precision-engineered components designed to increase efficiency and durability in your engine block:

  • Cold Air Intakes & Air Filtration – Performance sports filters and carbon intake systems for maximum air filling.
  • Intercoolers & Charge Coolers – Efficient intake air cooling to sustain consistent power output under heavy loads.
  • Forged Pistons & Connecting Rods – Heavy-duty internal components built to withstand extreme temperatures and boost pressures.
  • Turbos & Superchargers – Forced induction upgrades delivering significant power increases.
  • Ignition & Servicing – Competition spark plugs, high-output ignition coils, and high-performance oil filters.

Industry-Leading Benchmark Brands

We stock top tuning and motorsport manufacturers: Wagner Tuning, Forge Motorsport, Magnecor, Green Filter, BMC Filter, NGK, Vibra Technics, and Powerflex. We also supply OEM factory parts to ensure meticulous engine maintenance.

Why you should Choose Optimiz Access for Your Engine Upgrades

Since 2010, Optimiz Access has specialized in selecting top-tier engine components for the custom upgrading and maintenance of sports vehicles. Located in northern France (Hauts-de-France) — near Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin —, our expert technicians guide your hardware selection and provide professional installation in our workshop. We ensure strict quality control along with fast worldwide shipping.

Unleash Your Engine's Full Potential Today

Give your car the raw power and sharp response it deserves. Trust the expertise of Optimiz Access, select your engine performance parts today, and benefit from our fast dispatch.

Active filters

  • Categories: Allumage
  • Categories: Circuit d'eau
  • Categories: Préparation intérieure
  • Categories: Refroidissement
En Stock
€116.83 Price
En Stock
€116.83 Price
Jeu de segments pour piston origine Megane 3 RS
      Jeu de segments pour piston origine Megane 3 RS 1 Jeu comprend le necessaire pour 1 piston
      €116.83Price
      Jeu de segments pour piston origine Megane 3 RS
          Jeu de segments pour piston origine Megane 3 RS 1 Jeu comprend le necessaire pour 1 piston
          €116.83Price
          En Stock
          €1.84 Price
          En Stock
          €1.84 Price
          Collier serrage inox (durite) diametre 50-70mmCollier serrage inox (durite) diametre 50-70mm
              Collier serrage inox (durite) diametre 50-70mm Vendu à l'unité
              €1.84Price
              Collier serrage inox (durite) diametre 50-70mmCollier serrage inox (durite) diametre 50-70mm
                  Collier serrage inox (durite) diametre 50-70mm Vendu à l'unité
                  €1.84Price
                  Sonde pression Twingo R2New Genuine Renault Sport Oil Pressure Sensor - Clio R3 & Twingo R2
                      This new oil pressure sensor , from the Renault Sport competition catalog , is a vital safety part for the rally engines of the Renault Clio R3 and Twingo R2 . It is essential for monitoring lubrication and thereby preventing catastrophic engine failures caused by a lack or drop in oil pressure.
                      €195.78Price
                      Sonde pression Twingo R2New Genuine Renault Sport Oil Pressure Sensor - Clio R3 & Twingo R2
                          This new oil pressure sensor , from the Renault Sport competition catalog , is a vital safety part for the rally engines of the Renault Clio R3 and Twingo R2 . It is essential for monitoring lubrication and thereby preventing catastrophic engine failures caused by a lack or drop in oil pressure.
                          €195.78Price
                          En Stock
                          €116.83 Price
                          En Stock
                          €116.83 Price
                          Genuine Renault Expansion Tank for Clio 2 RSGenuine Renault Expansion Tank for Clio 2 RS
                              Do not risk major engine failure on your sports car. This genuine RENAULT expansion tank is the only certified part capable of maintaining the exact pressure of your cooling circuit. Specially designed for the Renault Clio 2 RS (all phases, including Jean Ragnotti, Clio RS1, RS2, 172, and 182), this coolant reservoir replaces your porous, yellowed, or...
                              €116.83Price
                              Genuine Renault Expansion Tank for Clio 2 RSGenuine Renault Expansion Tank for Clio 2 RS
                                  Do not risk major engine failure on your sports car. This genuine RENAULT expansion tank is the only certified part capable of maintaining the exact pressure of your cooling circuit. Specially designed for the Renault Clio 2 RS (all phases, including Jean Ragnotti, Clio RS1, RS2, 172, and 182), this coolant reservoir replaces your porous, yellowed, or...
                                  €116.83Price
                                  En Stock
                                  €5.63 Price
                                  En Stock
                                  €5.63 Price
                                  Joint de queue de soupape
                                      Joint de queue de soupape Attention pour Megane 3 RS les joints sont différents entre admission et échappement Vendu à l'unité
                                      €5.63Price
                                      Joint de queue de soupape
                                          Joint de queue de soupape Attention pour Megane 3 RS les joints sont différents entre admission et échappement Vendu à l'unité
                                          €5.63Price
                                          En Stock
                                          €2.08 Price
                                          En Stock
                                          €2.08 Price
                                          Collier serrage inox (durite) diametre 60-80mmCollier serrage inox (durite) diametre 60-80mm
                                              Collier serrage inox (durite) diametre 60-80mm Vendu à l'unité
                                              €2.08Price
                                              Collier serrage inox (durite) diametre 60-80mmCollier serrage inox (durite) diametre 60-80mm
                                                  Collier serrage inox (durite) diametre 60-80mm Vendu à l'unité
                                                  €2.08Price
                                                  Tampon inférieur radiateur Clio 3 RS y compris R3 et X85 CupTampon inférieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                      Tampon inférieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                      €7.19Price
                                                      Tampon inférieur radiateur Clio 3 RS y compris R3 et X85 CupTampon inférieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                          Tampon inférieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                          €7.19Price
                                                          En Stock
                                                          €139.14 Price
                                                          En Stock
                                                          €139.14 Price
                                                          Piston équipé C (X82.70) Clio 3 RS
                                                              The Renault complete piston (index C) is an original part, supplied with pin and pin clips, designed for your Renault Clio 3 RS and Renault Clio 3 X85 Cup . It ensures optimal engine performance and increased reliability.
                                                              €139.14Price
                                                              Piston équipé C (X82.70) Clio 3 RS
                                                                  The Renault complete piston (index C) is an original part, supplied with pin and pin clips, designed for your Renault Clio 3 RS and Renault Clio 3 X85 Cup . It ensures optimal engine performance and increased reliability.
                                                                  €139.14Price
                                                                  Bague étanchéité vis et bouchon arbre à cames admission Twingo RS, R1 et R2
                                                                      Bague étanchéité vis et bouchon arbre à cames admission Twingo RS, R1 et R2
                                                                      €37.90Price
                                                                      Bague étanchéité vis et bouchon arbre à cames admission Twingo RS, R1 et R2
                                                                          Bague étanchéité vis et bouchon arbre à cames admission Twingo RS, R1 et R2
                                                                          €37.90Price
                                                                          En Stock
                                                                          €31.01 Price
                                                                          En Stock
                                                                          €31.01 Price
                                                                              Kit colliers pour kit durites d'eau Forge Clio 2 RS
                                                                              €31.01Price
                                                                                  Kit colliers pour kit durites d'eau Forge Clio 2 RS
                                                                                  €31.01Price
                                                                                  En Stock
                                                                                  €1.00 Price
                                                                                  En Stock
                                                                                  €1.00 Price
                                                                                  Collier serrage inox (durite) diametre 8-12mm
                                                                                      Collier serrage inox (durite) diametre 8-12mm Vendu à l'unité
                                                                                      €1.00Price
                                                                                      Collier serrage inox (durite) diametre 8-12mm
                                                                                          Collier serrage inox (durite) diametre 8-12mm Vendu à l'unité
                                                                                          €1.00Price
                                                                                          En Stock
                                                                                          €345.64 Price
                                                                                          En Stock
                                                                                          €345.64 Price
                                                                                          Conduit d'eau refroidissement turbo Megane 2 RSConduit d'eau refroidissement turbo Megane 2 RS
                                                                                              Conduite d'eau refroidissement Turbo pour Megane 2 RS
                                                                                              €345.64Price
                                                                                              Conduit d'eau refroidissement turbo Megane 2 RSConduit d'eau refroidissement turbo Megane 2 RS
                                                                                                  Conduite d'eau refroidissement Turbo pour Megane 2 RS
                                                                                                  €345.64Price
                                                                                                  Tampon supérieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                                                                      Tampon supérieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                                                                      €7.96Price
                                                                                                      Tampon supérieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                                                                          Tampon supérieur radiateur Clio 3 RS y compris R3 et X85 Cup
                                                                                                          €7.96Price
                                                                                                          En Stock
                                                                                                          €34.73 €53.42 Regular price -35% off Price
                                                                                                          En Stock
                                                                                                          €34.73 €53.42 Regular price -35% off Price
                                                                                                          Bougie origine
                                                                                                              The genuine RENAULT Spark Plug , sold individually and an original manufacturer part, is essential for maintaining optimal performance in your Renault Megane 4 RS or Alpine A110 . Ensure perfect ignition and efficient combustion by choosing RENAULT quality.
                                                                                                              €34.73€53.42Regular price-35% offPrice
                                                                                                              Bougie origine
                                                                                                                  The genuine RENAULT Spark Plug , sold individually and an original manufacturer part, is essential for maintaining optimal performance in your Renault Megane 4 RS or Alpine A110 . Ensure perfect ignition and efficient combustion by choosing RENAULT quality.
                                                                                                                  €34.73€53.42Regular price-35% offPrice
                                                                                                                  Bague étanchéité arbre à cames échappement Twingo RS, R1 et R2
                                                                                                                      Bague étanchéité arbre à cames échappement Twingo RS, R1 et R2
                                                                                                                      €41.95Price
                                                                                                                      Bague étanchéité arbre à cames échappement Twingo RS, R1 et R2
                                                                                                                          Bague étanchéité arbre à cames échappement Twingo RS, R1 et R2
                                                                                                                          €41.95Price
                                                                                                                          En Stock
                                                                                                                          €5.66 Price
                                                                                                                          En Stock
                                                                                                                          €5.66 Price
                                                                                                                          Vis de fixation galet enrouleur de distribution K4MVis de fixation galet enrouleur de distribution K4M
                                                                                                                              Vis de fixation galet enrouleur de distribution K4M 8200581340
                                                                                                                              €5.66Price
                                                                                                                              Vis de fixation galet enrouleur de distribution K4MVis de fixation galet enrouleur de distribution K4M
                                                                                                                                  Vis de fixation galet enrouleur de distribution K4M 8200581340
                                                                                                                                  €5.66Price
                                                                                                                                  En Stock
                                                                                                                                  €133.56 Price
                                                                                                                                  En Stock
                                                                                                                                  €133.56 Price
                                                                                                                                  Piston équipé indice B (X82.70) Clio 3 RS et X85 Cup
                                                                                                                                      Piston équipé indice B (X=82.70) Clio 3 RS et X85 Cup Piston d'origine
                                                                                                                                      €133.56Price
                                                                                                                                      Piston équipé indice B (X82.70) Clio 3 RS et X85 Cup
                                                                                                                                          Piston équipé indice B (X=82.70) Clio 3 RS et X85 Cup Piston d'origine
                                                                                                                                          €133.56Price
                                                                                                                                          Linguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RSLinguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RS
                                                                                                                                              Linguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RSVéritable produit d'origine
                                                                                                                                              €90.76Price
                                                                                                                                              Linguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RSLinguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RS
                                                                                                                                                  Linguet rouleau Clio 2 RS et  Clio 3 RS y compris R3 et X85 Cup et Twingo RSVéritable produit d'origine
                                                                                                                                                  €90.76Price
                                                                                                                                                  Collection de 3 segments pour piston Twingo RS R1 et R2 160
                                                                                                                                                      Original RENAULT Piston Ring Set for Twingo 2 RS (for 1 piston) Do not compromise the compression and power of your Twingo 2 RS engine. This original RENAULT piston...
                                                                                                                                                      €68.32Price
                                                                                                                                                      Collection de 3 segments pour piston Twingo RS R1 et R2 160
                                                                                                                                                          Original RENAULT Piston Ring Set for Twingo 2 RS (for 1 piston) Do not compromise the compression and power of your Twingo 2 RS engine. This original RENAULT piston...
                                                                                                                                                          €68.32Price
                                                                                                                                                          En Stock
                                                                                                                                                          €1.00 Price
                                                                                                                                                          En Stock
                                                                                                                                                          €1.00 Price
                                                                                                                                                          Collier serrage inox (durite) diametre 12-20mm
                                                                                                                                                              Collier serrage inox (durite) diametre 12-20mm Vendu à l'unité
                                                                                                                                                              €1.00Price
                                                                                                                                                              Collier serrage inox (durite) diametre 12-20mm
                                                                                                                                                                  Collier serrage inox (durite) diametre 12-20mm Vendu à l'unité
                                                                                                                                                                  €1.00Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €82.45 Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €82.45 Price
                                                                                                                                                                  Durite d'eau sortie de radiateur Twingo RS R1 et R2
                                                                                                                                                                      Durite d'eau sortie de radiateur Twingo RS R1 et R2 Véritable produit d'origine
                                                                                                                                                                      €82.45Price
                                                                                                                                                                      Durite d'eau sortie de radiateur Twingo RS R1 et R2
                                                                                                                                                                          Durite d'eau sortie de radiateur Twingo RS R1 et R2 Véritable produit d'origine
                                                                                                                                                                          €82.45Price
                                                                                                                                                                          Vis de pompe à eau Clio 2 RS y compris X65Cup et Gr N
                                                                                                                                                                              Secure your engine block seal and guarantee the total reliability of your cooling circuit with these factory-spec Water Pump Fixing Bolts for the Renault Clio 2 RS, X65 Cup, and Group N . Engineered specifically for the naturally aspirated 2.0L 16V F4R engine, this high-grade...
                                                                                                                                                                              €2.82Price
                                                                                                                                                                              Vis de pompe à eau Clio 2 RS y compris X65Cup et Gr N
                                                                                                                                                                                  Secure your engine block seal and guarantee the total reliability of your cooling circuit with these factory-spec Water Pump Fixing Bolts for the Renault Clio 2 RS, X65 Cup, and Group N . Engineered specifically for the naturally aspirated 2.0L 16V F4R engine, this high-grade...
                                                                                                                                                                                  €2.82Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €243.60 Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €243.60 Price
                                                                                                                                                                                  Radiateur d'eau
                                                                                                                                                                                      Optimize your engine's cooling with this high-performance water radiator designed for demanding powerplants. Whether you own a standard Clio 3 RS or a competition version like the Clio R3 or Twingo R2 , this component is...
                                                                                                                                                                                      €243.60Price
                                                                                                                                                                                      Radiateur d'eau
                                                                                                                                                                                          Optimize your engine's cooling with this high-performance water radiator designed for demanding powerplants. Whether you own a standard Clio 3 RS or a competition version like the Clio R3 or Twingo R2 , this component is...
                                                                                                                                                                                          €243.60Price
                                                                                                                                                                                          En Stock
                                                                                                                                                                                          €15.49 Price
                                                                                                                                                                                          En Stock
                                                                                                                                                                                          €15.49 Price
                                                                                                                                                                                          bague étanchéité bobine crayon
                                                                                                                                                                                              The Renault ignition coil seal (gasket) is an original part designed to ensure perfect sealing and optimal performance of the ignition system on Renault Twingo 2 RS, Renault Clio 3 RS, Renault Clio R3, Renault Clio 3 X85 Cup, Renault Megane 2 RS, Renault Megane 3 RS, and Renault Megane N4 models.
                                                                                                                                                                                              €15.49Price
                                                                                                                                                                                              bague étanchéité bobine crayon
                                                                                                                                                                                                  The Renault ignition coil seal (gasket) is an original part designed to ensure perfect sealing and optimal performance of the ignition system on Renault Twingo 2 RS, Renault Clio 3 RS, Renault Clio R3, Renault Clio 3 X85 Cup, Renault Megane 2 RS, Renault Megane 3 RS, and Renault Megane N4 models.
                                                                                                                                                                                                  €15.49Price
                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                  €1.10 Price
                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                  €1.10 Price
                                                                                                                                                                                                  Collier serrage inox (durite) diametre 20-32mm
                                                                                                                                                                                                      Collier serrage inox (durite) diametre 20-32mm Vendu à l'unité
                                                                                                                                                                                                      €1.10Price
                                                                                                                                                                                                      Collier serrage inox (durite) diametre 20-32mm
                                                                                                                                                                                                          Collier serrage inox (durite) diametre 20-32mm Vendu à l'unité
                                                                                                                                                                                                          €1.10Price
                                                                                                                                                                                                          Durite Sortie radiateur de chauffage Twingo RS R1 et R2
                                                                                                                                                                                                              Durite Sortie radiateur de chauffage Twingo RS R1 et R2 Véritable produit d'origine
                                                                                                                                                                                                              €38.53Price
                                                                                                                                                                                                              Durite Sortie radiateur de chauffage Twingo RS R1 et R2
                                                                                                                                                                                                                  Durite Sortie radiateur de chauffage Twingo RS R1 et R2 Véritable produit d'origine
                                                                                                                                                                                                                  €38.53Price
                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                  €28.99 Price
                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                  €28.99 Price
                                                                                                                                                                                                                      Do not risk a devastating thermal meltdown or valve breakage in your top end during track days or rally stages. This genuine MPI forged exhaust valve , sold individually and designed for a direct plug-and-play replacement, protects your Renault Clio Williams cylinder head from extreme combustion temperatures. Unlike factory-cast valves that oxidize and weaken...
                                                                                                                                                                                                                      €28.99Price
                                                                                                                                                                                                                          Do not risk a devastating thermal meltdown or valve breakage in your top end during track days or rally stages. This genuine MPI forged exhaust valve , sold individually and designed for a direct plug-and-play replacement, protects your Renault Clio Williams cylinder head from extreme combustion temperatures. Unlike factory-cast valves that oxidize and weaken...
                                                                                                                                                                                                                          €28.99Price
                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                          €28.99 Price
                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                          €28.99 Price
                                                                                                                                                                                                                              Do not risk a catastrophic engine failure on your F7R block during high-RPM driving. This genuine MPI forged intake valve , sold individually and designed for a direct drop-in replacement, is the essential safety component to protect the top end of your Renault Clio Williams . Unlike factory-cast valves that eventually fatigue under extreme thermal stress and...
                                                                                                                                                                                                                              €28.99Price
                                                                                                                                                                                                                                  Do not risk a catastrophic engine failure on your F7R block during high-RPM driving. This genuine MPI forged intake valve , sold individually and designed for a direct drop-in replacement, is the essential safety component to protect the top end of your Renault Clio Williams . Unlike factory-cast valves that eventually fatigue under extreme thermal stress and...
                                                                                                                                                                                                                                  €28.99Price
                                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                                  €324.60 Price
                                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                                  €324.60 Price
                                                                                                                                                                                                                                      Do not risk a drastic loss of compression or excessive oil consumption during your next stage. This official Renault Sport piston ring set (designed for one piston) is the only genuine solution calibrated to maintain absolute sealing in your Clio R3 MAX engine. ...
                                                                                                                                                                                                                                      €324.60Price
                                                                                                                                                                                                                                          Do not risk a drastic loss of compression or excessive oil consumption during your next stage. This official Renault Sport piston ring set (designed for one piston) is the only genuine solution calibrated to maintain absolute sealing in your Clio R3 MAX engine. ...
                                                                                                                                                                                                                                          €324.60Price
                                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                                          €678.06 Price
                                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                                          €678.06 Price
                                                                                                                                                                                                                                              Do not risk a drop in compression or a major engine failure mid-stage. This official Renault Sport piston , supplied complete with its pin, is the only genuine component calibrated to restore the original performance of your Clio R3 MAX . Specifically...
                                                                                                                                                                                                                                              €678.06Price
                                                                                                                                                                                                                                                  Do not risk a drop in compression or a major engine failure mid-stage. This official Renault Sport piston , supplied complete with its pin, is the only genuine component calibrated to restore the original performance of your Clio R3 MAX . Specifically...
                                                                                                                                                                                                                                                  €678.06Price