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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: Alimentation
  • Categories: Entretien
  • Categories: Préparation intérieure
  • Categories: Refroidissement
Valve pression carter PCV Clio 4 RSGenuine Renault PCV Valve - Clio 4 RS / Mégane 4 RS & GT 205
      Don't let a poorly managed crankcase pressure impact the health of your engine! Get the genuine Renault PCV Valve (Crankcase Pressure Valve) , an essential part for the Renault Clio 4 RS , Mégane 4 RS , or Mégane 4 GT 205 . A faulty valve leads to oil leaks and loss of...
      €66.43Price
      Valve pression carter PCV Clio 4 RSGenuine Renault PCV Valve - Clio 4 RS / Mégane 4 RS & GT 205
          Don't let a poorly managed crankcase pressure impact the health of your engine! Get the genuine Renault PCV Valve (Crankcase Pressure Valve) , an essential part for the Renault Clio 4 RS , Mégane 4 RS , or Mégane 4 GT 205 . A faulty valve leads to oil leaks and loss of...
          €66.43Price
          Gicleur Piston 1-3 Clio 2 RS y compris Gr N et X65 Cup
              Gicleur Piston 1-3 Clio 2 RS y compris Gr N et X65 Cup
              €33.55Price
              Gicleur Piston 1-3 Clio 2 RS y compris Gr N et X65 Cup
                  Gicleur Piston 1-3 Clio 2 RS y compris Gr N et X65 Cup
                  €33.55Price
                  En Stock
                  €27.31 Price
                  En Stock
                  €27.31 Price
                  Joint Spy Vilebrequin Twingo RS y compris R1 et  R2
                      Joint Spy Vilebrequin Twingo RS y compris R1 et R2 Référence: 770086072
                      €27.31Price
                      Joint Spy Vilebrequin Twingo RS y compris R1 et  R2
                          Joint Spy Vilebrequin Twingo RS y compris R1 et R2 Référence: 770086072
                          €27.31Price
                          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
                                  €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
                                          En Stock
                                          €12.78 Price
                                          En Stock
                                          €12.78 Price
                                          Tuyau essence vapeur canister Ø8 Megane N4Tuyau essence vapeur canister Ø8 Megane N4
                                              Tuyau essence vapeur canister Ø8 Megane N4 Référence: 7711167251
                                              €12.78Price
                                              Tuyau essence vapeur canister Ø8 Megane N4Tuyau essence vapeur canister Ø8 Megane N4
                                                  Tuyau essence vapeur canister Ø8 Megane N4 Référence: 7711167251
                                                  €12.78Price
                                                  Joint cuivre de bouchon de rampe Twingo R1 et R2 et Clio R3
                                                      Joint cuivre de bouchon de rampe Twingo R1 et R2 et Clio R3 Référence: 7903062105
                                                      €4.16Price
                                                      Joint cuivre de bouchon de rampe Twingo R1 et R2 et Clio R3
                                                          Joint cuivre de bouchon de rampe Twingo R1 et R2 et Clio R3 Référence: 7903062105
                                                          €4.16Price
                                                          Gicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 CupGicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 Cup
                                                              Gicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 Cup  
                                                              €33.55Price
                                                              Gicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 CupGicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 Cup
                                                                  Gicleur Piston 2-4 Clio 2 RS y compris Gr N et x65 Cup  
                                                                  €33.55Price
                                                                  RENAULT SPORT Assembled Cylinder Head - Renault Twingo R2 EVO 195hpRENAULT SPORT Assembled Cylinder Head - Renault Twingo R2 EVO 195hp
                                                                      Optimize the performance of your Renault Twingo R2 EVO 195hp with this genuine RENAULT SPORT assembled cylinder head (ref. 7711167644). Supplied with valves, retainers, valve springs, rocker arms, and pushrods, this cylinder head is ready to be installed (camshafts not included). Guaranteed performance and reliability.
                                                                      €8,104.62Price
                                                                      RENAULT SPORT Assembled Cylinder Head - Renault Twingo R2 EVO 195hpRENAULT SPORT Assembled Cylinder Head - Renault Twingo R2 EVO 195hp
                                                                          Optimize the performance of your Renault Twingo R2 EVO 195hp with this genuine RENAULT SPORT assembled cylinder head (ref. 7711167644). Supplied with valves, retainers, valve springs, rocker arms, and pushrods, this cylinder head is ready to be installed (camshafts not included). Guaranteed performance and reliability.
                                                                          €8,104.62Price
                                                                          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
                                                                                  Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2
                                                                                      Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2 Référence: 7711050937
                                                                                      €3.04Price
                                                                                      Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2
                                                                                          Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2 Référence: 7711050937
                                                                                          €3.04Price
                                                                                          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
                                                                                                  En Stock
                                                                                                  €55.68 Price
                                                                                                  En Stock
                                                                                                  €55.68 Price
                                                                                                  Tuyau 200-06 lg:300 connection rampe Tatuus
                                                                                                      Tuyau 200-06 lg:300 connection rampe Tatuus Réference: 7711155525
                                                                                                      €55.68Price
                                                                                                      Tuyau 200-06 lg:300 connection rampe Tatuus
                                                                                                          Tuyau 200-06 lg:300 connection rampe Tatuus Réference: 7711155525
                                                                                                          €55.68Price
                                                                                                          Oil Filter - Renault Clio 4 RS, Megane 4 RS, Alpine A110Oil Filter - Renault Clio 4 RS, Megane 4 RS, Alpine A110
                                                                                                              Preserve your engine's integrity with this genuine Renault oil filter . Specifically engineered for the high-performance engines found in the Renault Clio 4 RS (1.6 Turbo), Renault Megane 4 RS , and Alpine A110 (1.8 Turbo), this filter guarantees optimal removal of impurities. ...
                                                                                                              €11.34Price
                                                                                                              Oil Filter - Renault Clio 4 RS, Megane 4 RS, Alpine A110Oil Filter - Renault Clio 4 RS, Megane 4 RS, Alpine A110
                                                                                                                  Preserve your engine's integrity with this genuine Renault oil filter . Specifically engineered for the high-performance engines found in the Renault Clio 4 RS (1.6 Turbo), Renault Megane 4 RS , and Alpine A110 (1.8 Turbo), this filter guarantees optimal removal of impurities. ...
                                                                                                                  €11.34Price
                                                                                                                  Joint de sonde de temperature d'eau Clio 2 RS y compris Gr N et X65 Cup
                                                                                                                      Joint de sonde de temperature d'eau Clio 2 RS y compris Gr N et X65 Cup
                                                                                                                      €2.47Price
                                                                                                                      Joint de sonde de temperature d'eau Clio 2 RS y compris Gr N et X65 Cup
                                                                                                                          Joint de sonde de temperature d'eau Clio 2 RS y compris Gr N et X65 Cup
                                                                                                                          €2.47Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €24.71 Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €24.71 Price
                                                                                                                          Genuine NISSAN Oil Filter for NISSAN GTR R35Genuine NISSAN Oil Filter for NISSAN GTR R35
                                                                                                                              Do not compromise the lubrication of your VR38DETT engine. This genuine Nissan oil filter is the only component certified by the manufacturer to ensure constant oil pressure and optimal filtration of impurities. Essential for every engine oil change , it preserves the longevity of your Nissan GTR R35 , whether for daily...
                                                                                                                              €24.71Price
                                                                                                                              Genuine NISSAN Oil Filter for NISSAN GTR R35Genuine NISSAN Oil Filter for NISSAN GTR R35
                                                                                                                                  Do not compromise the lubrication of your VR38DETT engine. This genuine Nissan oil filter is the only component certified by the manufacturer to ensure constant oil pressure and optimal filtration of impurities. Essential for every engine oil change , it preserves the longevity of your Nissan GTR R35 , whether for daily...
                                                                                                                                  €24.71Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €8.24 €20.59 Regular price -60% off Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €8.24 €20.59 Regular price -60% off Price
                                                                                                                                  16mm Core Plug for Renault Clio 2 3 RS & Megane 2 3 RS16mm Core Plug for Renault Clio 2 3 RS & Megane 2 3 RS
                                                                                                                                      Do not risk a costly engine failure during your next track day. This 16mm diameter core plug is an essential engine safety component for all Renault Sport F4R blocks. Whether for the timing side or the left of the oil filter , this engine block expansion plug ensures a perfect seal and prevents coolant leaks under high...
                                                                                                                                      €8.24€20.59Regular price-60% offPrice
                                                                                                                                      16mm Core Plug for Renault Clio 2 3 RS & Megane 2 3 RS16mm Core Plug for Renault Clio 2 3 RS & Megane 2 3 RS
                                                                                                                                          Do not risk a costly engine failure during your next track day. This 16mm diameter core plug is an essential engine safety component for all Renault Sport F4R blocks. Whether for the timing side or the left of the oil filter , this engine block expansion plug ensures a perfect seal and prevents coolant leaks under high...
                                                                                                                                          €8.24€20.59Regular price-60% offPrice
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €74.52 Price
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €74.52 Price
                                                                                                                                          Additional Timing Belt Protection Plate - Clio 3 RS / Mégane 2 RS / Mégane 3 RS (F4R)Additional Timing Belt Protection Plate - Clio 3 RS / Mégane 2 RS / Mégane 3 RS (F4R)
                                                                                                                                              Do not risk the destruction of your F4R engine ! This Additional Timing Belt Protection Plate is essential for the Renault Clio 3 RS , Mégane 2 RS , and Mégane 3 RS . It offers crucial mechanical safety , protecting the timing belt from...
                                                                                                                                              €74.52Price
                                                                                                                                              Additional Timing Belt Protection Plate - Clio 3 RS / Mégane 2 RS / Mégane 3 RS (F4R)Additional Timing Belt Protection Plate - Clio 3 RS / Mégane 2 RS / Mégane 3 RS (F4R)
                                                                                                                                                  Do not risk the destruction of your F4R engine ! This Additional Timing Belt Protection Plate is essential for the Renault Clio 3 RS , Mégane 2 RS , and Mégane 3 RS . It offers crucial mechanical safety , protecting the timing belt from...
                                                                                                                                                  €74.52Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €79.00 Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €79.00 Price
                                                                                                                                                  Additional Timing Belt Protection Plate - Clio 2 RS (F4R)Additional Timing Belt Protection Plate - Clio 2 RS (F4R)
                                                                                                                                                      Do not take the risk of a devastating engine failure ! This Additional Timing Belt Protection Plate is the essential element to secure the timing belt of your Renault Clio 2 RS (F4R engine). It provides vital protection against stone chips and debris, including...
                                                                                                                                                      €79.00Price
                                                                                                                                                      Additional Timing Belt Protection Plate - Clio 2 RS (F4R)Additional Timing Belt Protection Plate - Clio 2 RS (F4R)
                                                                                                                                                          Do not take the risk of a devastating engine failure ! This Additional Timing Belt Protection Plate is the essential element to secure the timing belt of your Renault Clio 2 RS (F4R engine). It provides vital protection against stone chips and debris, including...
                                                                                                                                                          €79.00Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €35.10 Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €35.10 Price
                                                                                                                                                          Genuine Renault Engine Oil Filler Cap for Clio 2/3 RS, Twingo 2 RS
                                                                                                                                                              Preserve the performance of your Renault Clio 2 RS , Renault Clio 3 RS , or Renault Twingo 2 RS with this genuine RENAULT engine oil filler cap . An essential part to maintain the tightness and cleanliness of your engine. Find complementary products for the maintenance of your sports car at the bottom of the page.
                                                                                                                                                              €35.10Price
                                                                                                                                                              Genuine Renault Engine Oil Filler Cap for Clio 2/3 RS, Twingo 2 RS
                                                                                                                                                                  Preserve the performance of your Renault Clio 2 RS , Renault Clio 3 RS , or Renault Twingo 2 RS with this genuine RENAULT engine oil filler cap . An essential part to maintain the tightness and cleanliness of your engine. Find complementary products for the maintenance of your sports car at the bottom of the page.
                                                                                                                                                                  €35.10Price
                                                                                                                                                                  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
                                                                                                                                                                                                  €407.03 Price
                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                  €407.03 Price
                                                                                                                                                                                                  New Genuine Renault Starter Motor - Clio 4 RS (All Phases)
                                                                                                                                                                                                      Ensure an instantaneous start for your Renault Clio 4 RS (all phases) with this brand-new genuine Renault starter motor . Unlike remanufactured units, this 100% new product guarantees maximum reliability and increased longevity for your 1.6 Turbo engine. Don't risk an immobilizing breakdown—choose manufacturer...
                                                                                                                                                                                                      €407.03Price
                                                                                                                                                                                                      New Genuine Renault Starter Motor - Clio 4 RS (All Phases)
                                                                                                                                                                                                          Ensure an instantaneous start for your Renault Clio 4 RS (all phases) with this brand-new genuine Renault starter motor . Unlike remanufactured units, this 100% new product guarantees maximum reliability and increased longevity for your 1.6 Turbo engine. Don't risk an immobilizing breakdown—choose manufacturer...
                                                                                                                                                                                                          €407.03Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €77.12 Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €77.12 Price
                                                                                                                                                                                                          Power Distribution Box & Starter Fuse Renault Megane 3 RSPower Distribution Box & Starter Fuse Renault Megane 3 RS
                                                                                                                                                                                                              Do not let a minor electrical failure lead to a major breakdown. This genuine Renault power distribution box is a critical component of your Renault Megane 3 RS starting circuit. Integrating essential high-power fuses , specifically for the starter motor and alternator protection, it ensures secure energy management from your...
                                                                                                                                                                                                              €77.12Price
                                                                                                                                                                                                              Power Distribution Box & Starter Fuse Renault Megane 3 RSPower Distribution Box & Starter Fuse Renault Megane 3 RS
                                                                                                                                                                                                                  Do not let a minor electrical failure lead to a major breakdown. This genuine Renault power distribution box is a critical component of your Renault Megane 3 RS starting circuit. Integrating essential high-power fuses , specifically for the starter motor and alternator protection, it ensures secure energy management from your...
                                                                                                                                                                                                                  €77.12Price