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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.

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  • Categories: Circuit d'eau
  • Categories: Kit Allègement
  • Categories: Préparation intérieure
  • Categories: Refroidissement
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
          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
                  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
                          €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
                                          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
                                                  En Stock
                                                  €199.00 Price
                                                  En Stock
                                                  €199.00 Price
                                                  Kit suppression de direction assistéeKit suppression de direction assistée
                                                      Kit suppression de direction assistée comprenant la poulie folle et son support.
                                                      €199.00Price
                                                      Kit suppression de direction assistéeKit suppression de direction assistée
                                                          Kit suppression de direction assistée comprenant la poulie folle et son support.
                                                          €199.00Price
                                                          En Stock
                                                          €82.24 Price
                                                          En Stock
                                                          €82.24 Price
                                                          Calorstat Megane 3 RS
                                                              Ensure optimal thermal regulation for your Renault Megane 3 RS with this genuine Renault thermostat . With an opening temperature of 83°C , it is the key part to ensure your engine runs at the ideal temperature, preventing both overheating and undercooling. Don't compromise the health of your F4R engine.
                                                              €82.24Price
                                                              Calorstat Megane 3 RS
                                                                  Ensure optimal thermal regulation for your Renault Megane 3 RS with this genuine Renault thermostat . With an opening temperature of 83°C , it is the key part to ensure your engine runs at the ideal temperature, preventing both overheating and undercooling. Don't compromise the health of your F4R engine.
                                                                  €82.24Price
                                                                  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
                                                                                                  Sur commande ou en cours de réappro
                                                                                                  €14.20 Price
                                                                                                  Sur commande ou en cours de réappro
                                                                                                  €14.20 Price
                                                                                                  Genuine Water Pump Gasket Megane 4 RS Clio 4 RS Alpine A110Genuine Water Pump Gasket Megane 4 RS Clio 4 RS Alpine A110
                                                                                                      Do not risk catastrophic engine failure due to a coolant leak. This genuine Renault water pump gasket (certified OEM part) is the only component calibrated to guarantee absolute sealing of your high-performance engine's thermal circuit. Specifically engineered for the demanding engines of the Renault Megane 4 RS ,...
                                                                                                      €14.20Price
                                                                                                      Genuine Water Pump Gasket Megane 4 RS Clio 4 RS Alpine A110Genuine Water Pump Gasket Megane 4 RS Clio 4 RS Alpine A110
                                                                                                          Do not risk catastrophic engine failure due to a coolant leak. This genuine Renault water pump gasket (certified OEM part) is the only component calibrated to guarantee absolute sealing of your high-performance engine's thermal circuit. Specifically engineered for the demanding engines of the Renault Megane 4 RS ,...
                                                                                                          €14.20Price
                                                                                                          Sur commande ou en cours de réappro
                                                                                                          €309.00 Price
                                                                                                          Sur commande ou en cours de réappro
                                                                                                          €309.00 Price
                                                                                                          Complete Silicone Coolant Hose Kit Renault Mégane 2 RSComplete Silicone Coolant Hose Kit Renault Mégane 2 RS
                                                                                                              Complete Silicone Coolant Hose Kit – Renault Mégane 2 RS Complete silicone coolant hose kit designed for compatible Renault Mégane 2 RS models. The kit is intended to replace the corresponding hoses in the engine cooling system. Check the engine version and cooling system configuration before ordering.
                                                                                                              €309.00Price
                                                                                                              Complete Silicone Coolant Hose Kit Renault Mégane 2 RSComplete Silicone Coolant Hose Kit Renault Mégane 2 RS
                                                                                                                  Complete Silicone Coolant Hose Kit – Renault Mégane 2 RS Complete silicone coolant hose kit designed for compatible Renault Mégane 2 RS models. The kit is intended to replace the corresponding hoses in the engine cooling system. Check the engine version and cooling system configuration before ordering.
                                                                                                                  €309.00Price
                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                  €53.36 Price
                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                  €53.36 Price
                                                                                                                  Soupape échappement Inconel Megane 3 RSHigh-Performance Inconel Exhaust Valve for Renault Megane 3 RS
                                                                                                                      Don't compromise on the performance and reliability of your Renault Megane 3 RS ! Our Inconel exhaust valve , designed as a direct replacement for the original, is crucial for preserving your engine's integrity under extreme stress. An essential investment for the durability and power of your sports vehicle.
                                                                                                                      €53.36Price
                                                                                                                      Soupape échappement Inconel Megane 3 RSHigh-Performance Inconel Exhaust Valve for Renault Megane 3 RS
                                                                                                                          Don't compromise on the performance and reliability of your Renault Megane 3 RS ! Our Inconel exhaust valve , designed as a direct replacement for the original, is crucial for preserving your engine's integrity under extreme stress. An essential investment for the durability and power of your sports vehicle.
                                                                                                                          €53.36Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €3.49 Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €3.49 Price
                                                                                                                          Bouchon obturateur cylindre coté embrayage Clio 2 RSBouchon obturateur cylindre coté embrayage Clio 2 RS
                                                                                                                              Bouchon obturateur cylindre coté embrayage Clio 2 RS
                                                                                                                              €3.49Price
                                                                                                                              Bouchon obturateur cylindre coté embrayage Clio 2 RSBouchon obturateur cylindre coté embrayage Clio 2 RS
                                                                                                                                  Bouchon obturateur cylindre coté embrayage Clio 2 RS
                                                                                                                                  €3.49Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €79.54 Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €79.54 Price
                                                                                                                                      Couvercle boitier sortie d'eau (calorstat) Clio 2 RS
                                                                                                                                      €79.54Price
                                                                                                                                          Couvercle boitier sortie d'eau (calorstat) Clio 2 RS
                                                                                                                                          €79.54Price
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €117.79 Price
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €117.79 Price
                                                                                                                                              Capteur température d'eau Clio 4 RS Capteur se positionnant sur le boitier de sortie d'eau de la culasse
                                                                                                                                              €117.79Price
                                                                                                                                                  Capteur température d'eau Clio 4 RS Capteur se positionnant sur le boitier de sortie d'eau de la culasse
                                                                                                                                                  €117.79Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €13.57 Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €13.57 Price
                                                                                                                                                      Buse de diffusion 0.5mm Clio 4 X98 Cup et R3T Référence: 8201489621
                                                                                                                                                      €13.57Price
                                                                                                                                                          Buse de diffusion 0.5mm Clio 4 X98 Cup et R3T Référence: 8201489621
                                                                                                                                                          €13.57Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €12.71 Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €12.71 Price
                                                                                                                                                              Porte filtre 200μ Clio 4 X98 R3T et Cup Référence: 8201489625
                                                                                                                                                              €12.71Price
                                                                                                                                                                  Porte filtre 200μ Clio 4 X98 R3T et Cup Référence: 8201489625
                                                                                                                                                                  €12.71Price
                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                  €319.00 Price
                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                  €319.00 Price
                                                                                                                                                                  Mechanical A/C Delete Kit Renault Clio 4 RS / Mégane 4 RS / Alpine A110Mechanical A/C Delete Kit Renault Clio 4 RS / Mégane 4 RS / Alpine A110
                                                                                                                                                                      The Optimiz Access Mechanical A/C Delete Kit is the essential core component for lightening your sports vehicle. Designed specifically for the Renault Clio 4 RS , Renault Mégane 4 RS , and the Alpine A110 , this kit allows you to replace the A/C compressor with a high-quality fixed...
                                                                                                                                                                      €319.00Price
                                                                                                                                                                      Mechanical A/C Delete Kit Renault Clio 4 RS / Mégane 4 RS / Alpine A110Mechanical A/C Delete Kit Renault Clio 4 RS / Mégane 4 RS / Alpine A110
                                                                                                                                                                          The Optimiz Access Mechanical A/C Delete Kit is the essential core component for lightening your sports vehicle. Designed specifically for the Renault Clio 4 RS , Renault Mégane 4 RS , and the Alpine A110 , this kit allows you to replace the A/C compressor with a high-quality fixed...
                                                                                                                                                                          €319.00Price
                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                          €384.00 Price
                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                          €384.00 Price
                                                                                                                                                                          Kit Suppression de Clim Clio 3 RS - Megane 2 RS -  Megane 3 RSAC Delete Kit with Freewheel Pulley for Renault Clio 3 RS, Megane 2 RS, and Megane 3 RS
                                                                                                                                                                              Enhance the power-to-weight ratio of your Renault Clio 3 RS, Megane 2 RS, or Megane 3 RS with our complete AC delete kit. Replace the AC compressor with a smooth-running freewheel pulley, and enjoy noticeable weight reduction and improved engine responsiveness. Includes all necessary components, including the accessory belt.
                                                                                                                                                                              €384.00Price
                                                                                                                                                                              Kit Suppression de Clim Clio 3 RS - Megane 2 RS -  Megane 3 RSAC Delete Kit with Freewheel Pulley for Renault Clio 3 RS, Megane 2 RS, and Megane 3 RS
                                                                                                                                                                                  Enhance the power-to-weight ratio of your Renault Clio 3 RS, Megane 2 RS, or Megane 3 RS with our complete AC delete kit. Replace the AC compressor with a smooth-running freewheel pulley, and enjoy noticeable weight reduction and improved engine responsiveness. Includes all necessary components, including the accessory belt.
                                                                                                                                                                                  €384.00Price
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €24.89 Price
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €24.89 Price
                                                                                                                                                                                  Tuyau entrée dégazage Clio 3 RS y compris R3 et X85 Cup
                                                                                                                                                                                      Tuyau entrée dégazage Clio 3 RS y compris R3 et X85 Cup
                                                                                                                                                                                      €24.89Price
                                                                                                                                                                                      Tuyau entrée dégazage Clio 3 RS y compris R3 et X85 Cup
                                                                                                                                                                                          Tuyau entrée dégazage Clio 3 RS y compris R3 et X85 Cup
                                                                                                                                                                                          €24.89Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €133.39 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €133.39 Price
                                                                                                                                                                                          Joint de Culasse renforcé Cometic Megane 2 RS 1.3mm
                                                                                                                                                                                              Joint de culasse Cometic. Alésage du joint 83mm épaisseur du joint 1.3 mm Haute résistance. Composés de trois feuilles d'acier inoxydable pour améliorer la solidité et la résistance à la corrosion. D'autres alésages et épaisseur disponibles, nous contacter.
                                                                                                                                                                                              €133.39Price
                                                                                                                                                                                              Joint de Culasse renforcé Cometic Megane 2 RS 1.3mm
                                                                                                                                                                                                  Joint de culasse Cometic. Alésage du joint 83mm épaisseur du joint 1.3 mm Haute résistance. Composés de trois feuilles d'acier inoxydable pour améliorer la solidité et la résistance à la corrosion. D'autres alésages et épaisseur disponibles, nous contacter.
                                                                                                                                                                                                  €133.39Price
                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                  €154.22 Price
                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                  €154.22 Price
                                                                                                                                                                                                  Poulie Damper Non Amortie Clio 2 RS
                                                                                                                                                                                                      Poulie Damper Rigide pour Clio 2 RS. Poids: 530 Grs Poulie avec 4 dents de large nécessitant une autre courroie que celle d'origine.
                                                                                                                                                                                                      €154.22Price
                                                                                                                                                                                                      Poulie Damper Non Amortie Clio 2 RS
                                                                                                                                                                                                          Poulie Damper Rigide pour Clio 2 RS. Poids: 530 Grs Poulie avec 4 dents de large nécessitant une autre courroie que celle d'origine.
                                                                                                                                                                                                          €154.22Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €15.34 Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €15.34 Price
                                                                                                                                                                                                          Vis fixation chapeau palier vilebrequin à l'unité
                                                                                                                                                                                                              This genuine Renault crankshaft bearing cap bolt is designed to ensure a solid and durable attachment of the crankshaft bearing in your engine. Precision-machined and manufactured to the highest standards, it ensures optimal performance and extends the lifespan of your engine.
                                                                                                                                                                                                              €15.34Price
                                                                                                                                                                                                              Vis fixation chapeau palier vilebrequin à l'unité
                                                                                                                                                                                                                  This genuine Renault crankshaft bearing cap bolt is designed to ensure a solid and durable attachment of the crankshaft bearing in your engine. Precision-machined and manufactured to the highest standards, it ensures optimal performance and extends the lifespan of your engine.
                                                                                                                                                                                                                  €15.34Price