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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: Kit Allègement
  • Categories: Préparation intérieure
  • Categories: Suralimentation (Turbo)
Joint de conduit d'air sortie de turbo Clio 4 RS - Megane 4 GT et RS
      Ensure absolute air tightness within your forced induction system with the Genuine Renault Turbo Outlet Air Duct Gasket . Specifically calibrated to withstand the high pressures of turbocharged engines, this official O-ring eliminates boost leaks between the turbocharger and...
      €15.34Price
      Joint de conduit d'air sortie de turbo Clio 4 RS - Megane 4 GT et RS
          Ensure absolute air tightness within your forced induction system with the Genuine Renault Turbo Outlet Air Duct Gasket . Specifically calibrated to withstand the high pressures of turbocharged engines, this official O-ring eliminates boost leaks between the turbocharger and...
          €15.34Price
          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
                  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
                          €35.68 Price
                          En Stock
                          €35.68 Price
                          Butée basse pédale d'accélérateur Twingo R2Butée basse pédale d'accélérateur Twingo R2
                              Butée basse pédale d'accélérateur Twingo R2 Référence: 7711157182
                              €35.68Price
                              Butée basse pédale d'accélérateur Twingo R2Butée basse pédale d'accélérateur Twingo R2
                                  Butée basse pédale d'accélérateur Twingo R2 Référence: 7711157182
                                  €35.68Price
                                  Interrupteur coup de poing Megane N4
                                      Take zero risks on the track or in competition with this genuine Renault Sport emergency kill switch . An essential component of the electrical system for the Renault Megane N4 and Renault Twingo R2 , this emergency cutoff switch immediately cuts off power in the event of an incident to prevent electrical...
                                      €20.30Price
                                      Interrupteur coup de poing Megane N4
                                          Take zero risks on the track or in competition with this genuine Renault Sport emergency kill switch . An essential component of the electrical system for the Renault Megane N4 and Renault Twingo R2 , this emergency cutoff switch immediately cuts off power in the event of an incident to prevent electrical...
                                          €20.30Price
                                          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
                                                  Durite d'induction (admission) Forge Motorsport Megane 4 RSDurite d'induction (admission) Forge Motorsport Megane 4 RS
                                                      Durite d'induction (admission) Forge Motorsport Megane 4 RS Produit de qualité permettant de limiter les perturbations.
                                                      €118.31Price
                                                      Durite d'induction (admission) Forge Motorsport Megane 4 RSDurite d'induction (admission) Forge Motorsport Megane 4 RS
                                                          Durite d'induction (admission) Forge Motorsport Megane 4 RS Produit de qualité permettant de limiter les perturbations.
                                                          €118.31Price
                                                          En Stock
                                                          €402.96 Price
                                                          En Stock
                                                          €402.96 Price
                                                          Convergent boitier filtre assemblé Twingo R2 195cvConvergent boitier filtre assemblé Twingo R2 195cv
                                                              Convergent boitier filtre assemblé Twingo R2 195cv
                                                              €402.96Price
                                                              Convergent boitier filtre assemblé Twingo R2 195cvConvergent boitier filtre assemblé Twingo R2 195cv
                                                                  Convergent boitier filtre assemblé Twingo R2 195cv
                                                                  €402.96Price
                                                                  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
                                                                          En Stock
                                                                          €27.47 Price
                                                                          En Stock
                                                                          €27.47 Price
                                                                          Joint de turbo sur collecteur Megane 2 RS Megane 3 RS
                                                                              Optimize your F4RT engine's sealing with this genuine RENAULT turbocharger to manifold gasket . Specifically designed for the Renault Megane 2 RS and Megane 3 RS , it is the essential component to maintain nominal boost pressure. Do not risk an exhaust leak that would degrade your performance and the...
                                                                              €27.47Price
                                                                              Joint de turbo sur collecteur Megane 2 RS Megane 3 RS
                                                                                  Optimize your F4RT engine's sealing with this genuine RENAULT turbocharger to manifold gasket . Specifically designed for the Renault Megane 2 RS and Megane 3 RS , it is the essential component to maintain nominal boost pressure. Do not risk an exhaust leak that would degrade your performance and the...
                                                                                  €27.47Price
                                                                                  En Stock
                                                                                  €69.56 Price
                                                                                  En Stock
                                                                                  €69.56 Price
                                                                                  Flexible à carburant Té / rampe Clio 3 Cup
                                                                                      Do not risk a fuel system failure mid-session. The Goodridge Tee to fuel rail hose is crucial for the reliability of your Clio 3 x85 Cup . Keeping a worn or inadequate hose directly exposes your engine to critical fuel starvation or severe leak risks. Permanently secure your injection system with this high-precision...
                                                                                      €69.56Price
                                                                                      Flexible à carburant Té / rampe Clio 3 Cup
                                                                                          Do not risk a fuel system failure mid-session. The Goodridge Tee to fuel rail hose is crucial for the reliability of your Clio 3 x85 Cup . Keeping a worn or inadequate hose directly exposes your engine to critical fuel starvation or severe leak risks. Permanently secure your injection system with this high-precision...
                                                                                          €69.56Price
                                                                                          En Stock
                                                                                          €13.37 Price
                                                                                          En Stock
                                                                                          €13.37 Price
                                                                                          Joint Plenum Clio 2 RS
                                                                                              Joint Plenum Clio 2 RS. Joint permettant de faire l’étanchéité entre le collecteur d'admission et le plenum Il est conseillé de le changer lors à chaque démontage et donc lors du retaillage de l'ensemble collecteur / plenum
                                                                                              €13.37Price
                                                                                              Joint Plenum Clio 2 RS
                                                                                                  Joint Plenum Clio 2 RS. Joint permettant de faire l’étanchéité entre le collecteur d'admission et le plenum Il est conseillé de le changer lors à chaque démontage et donc lors du retaillage de l'ensemble collecteur / plenum
                                                                                                  €13.37Price
                                                                                                  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
                                                                                                          €211.24 Price
                                                                                                          En Stock
                                                                                                          €211.24 Price
                                                                                                          Cablage Volant ALS Megane N4
                                                                                                              Optimize the management of your anti-lag system with the Genuine Renault Sport Steering Wheel ALS Wiring Harness (Part Number 7711167187) . Specifically engineered for the rally-spec Megane N4 , this motorsport-grade electrical loom ensures a shielded,...
                                                                                                              €211.24Price
                                                                                                              Cablage Volant ALS Megane N4
                                                                                                                  Optimize the management of your anti-lag system with the Genuine Renault Sport Steering Wheel ALS Wiring Harness (Part Number 7711167187) . Specifically engineered for the rally-spec Megane N4 , this motorsport-grade electrical loom ensures a shielded,...
                                                                                                                  €211.24Price
                                                                                                                  Dump Valve GFB DV+ - Diverter Valve Clio 4 RS - Megane 4 RS et Megane 4 GTGFB DV+ Diverter Valve - Renault Clio 4 RS / Megane 4 GT / Megane 4 RS / Alpine A110
                                                                                                                      Stop losing your turbo boost! The GFB DV+ Dump Valve (Diverter Valve) is the essential upgrade for the reliability and responsiveness of your Renault Sport 1.6T and 1.8T engine (Clio 4 RS, Megane 4 GT, Megane 4 RS, Alpine A110). Retain the factory electronics...
                                                                                                                      €127.86Price
                                                                                                                      Dump Valve GFB DV+ - Diverter Valve Clio 4 RS - Megane 4 RS et Megane 4 GTGFB DV+ Diverter Valve - Renault Clio 4 RS / Megane 4 GT / Megane 4 RS / Alpine A110
                                                                                                                          Stop losing your turbo boost! The GFB DV+ Dump Valve (Diverter Valve) is the essential upgrade for the reliability and responsiveness of your Renault Sport 1.6T and 1.8T engine (Clio 4 RS, Megane 4 GT, Megane 4 RS, Alpine A110). Retain the factory electronics...
                                                                                                                          €127.86Price
                                                                                                                          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
                                                                                                                                  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
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €188.74 Price
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €188.74 Price
                                                                                                                                                                                  Jauge pompe Clio 2 RS 1
                                                                                                                                                                                      Jauge pompe Clio 2 RS 1 Modele spécifique ayant le régulateur sur la pompe
                                                                                                                                                                                      €188.74Price
                                                                                                                                                                                      Jauge pompe Clio 2 RS 1
                                                                                                                                                                                          Jauge pompe Clio 2 RS 1 Modele spécifique ayant le régulateur sur la pompe
                                                                                                                                                                                          €188.74Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €272.90 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €272.90 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €41.93 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €41.93 Price
                                                                                                                                                                                              Do not sacrifice safety for performance. The Forge Motorsport Adaptive Cruise Control (ACC) bracket is the essential solution for Audi RS3 models equipped with the Forge FMINT4 intercooler. Perfect Compatibility : Developed exclusively for the FMINT4 intercooler. ...
                                                                                                                                                                                              €41.93Price
                                                                                                                                                                                                  Do not sacrifice safety for performance. The Forge Motorsport Adaptive Cruise Control (ACC) bracket is the essential solution for Audi RS3 models equipped with the Forge FMINT4 intercooler. Perfect Compatibility : Developed exclusively for the FMINT4 intercooler. ...
                                                                                                                                                                                                  €41.93Price
                                                                                                                                                                                                  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