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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: Circuit d'eau
  • Categories: Refroidissement
  • Categories: Suralimentation (Turbo)
En Stock
€36.01 Price
En Stock
€36.01 Price
Kit ressorts Dump Valve Forge
      Kit comprenant plusieurs ressorts pour ajuster vos Dump Valve Ne convient pas pour les références de dump suivantes : FMDVFSIT, FMDVFSITVR et FMDVK04D Kit permettant l'optimisation de votre Dump afin de l'ajuster à vos autres modifications (préparation). Il est composé de 4 ressorts de remplacement. Couleurs des ressorts et pressions correspondantes: Vert 0,3 à 1,03 Bar Jaune 1.03 à 1,53 Bar...
      €36.01Price
      Kit ressorts Dump Valve Forge
          Kit comprenant plusieurs ressorts pour ajuster vos Dump Valve Ne convient pas pour les références de dump suivantes : FMDVFSIT, FMDVFSITVR et FMDVK04D Kit permettant l'optimisation de votre Dump afin de l'ajuster à vos autres modifications (préparation). Il est composé de 4 ressorts de remplacement. Couleurs des ressorts et pressions correspondantes: Vert 0,3 à 1,03 Bar Jaune 1.03 à 1,53 Bar...
          €36.01Price
          Dispo selon configuration
          €6.00 Price
          Dispo selon configuration
          €6.00 Price
          Tuyau de dépressionTuyau de dépression
              Tuyau de depression de diamètre 4mm. Sert généralement pour l'installation de Dump Valve. Prix au metre
              €6.00Price
              Tuyau de dépressionTuyau de dépression
                  Tuyau de depression de diamètre 4mm. Sert généralement pour l'installation de Dump Valve. Prix au metre
                  €6.00Price
                  En Stock
                  €83.39 Price
                  En Stock
                  €83.39 Price
                  Boitier sortie eau sans calorstat Twingo R1 R2
                      Boitier sortie eau sans calorstat Twingo R1 R2 Référence: 7711162845
                      €83.39Price
                      Boitier sortie eau sans calorstat Twingo R1 R2
                          Boitier sortie eau sans calorstat Twingo R1 R2 Référence: 7711162845
                          €83.39Price
                          Durite Forge Induction Megane 2 RSDurite Forge Induction Megane 2 RS
                              Durite Forge Silicone. Se monte en lieu et place Plusieurs Coloris Disponibles
                              €140.75Price
                              Durite Forge Induction Megane 2 RSDurite Forge Induction Megane 2 RS
                                  Durite Forge Silicone. Se monte en lieu et place Plusieurs Coloris Disponibles
                                  €140.75Price
                                  Dump Valve Ouverte Forge Clio 4 RSDump Valve Ouverte Forge Clio 4 RS
                                      The Forge Motorsport open dump valve , reference FMDVC200A , is designed for the Renault Clio IV RS 1.6 Turbo 200/220 . This atmospheric blow-off valve replaces the standard setup and releases excess boost pressure externally when the throttle is lifted. The kit is specifically developed for the Clio 4 RS and includes...
                                      €191.53Price
                                      Dump Valve Ouverte Forge Clio 4 RSDump Valve Ouverte Forge Clio 4 RS
                                          The Forge Motorsport open dump valve , reference FMDVC200A , is designed for the Renault Clio IV RS 1.6 Turbo 200/220 . This atmospheric blow-off valve replaces the standard setup and releases excess boost pressure externally when the throttle is lifted. The kit is specifically developed for the Clio 4 RS and includes...
                                          €191.53Price
                                          En Stock
                                          €220.46 Price
                                          En Stock
                                          €220.46 Price
                                          Dump Valve Forge Recirculation Megane RS
                                              Maximize your engine's responsiveness with the Forge Motorsport Recirculation Dump Valve for Renault Megane 2 RS and Megane 3 RS (reference FMDVRMR ). Unlike atmospheric blow-off valves, this recirculation version diverts air back into the intake system to...
                                              €220.46Price
                                              Dump Valve Forge Recirculation Megane RS
                                                  Maximize your engine's responsiveness with the Forge Motorsport Recirculation Dump Valve for Renault Megane 2 RS and Megane 3 RS (reference FMDVRMR ). Unlike atmospheric blow-off valves, this recirculation version diverts air back into the intake system to...
                                                  €220.46Price
                                                  En Stock
                                                  €105.52 Price
                                                  En Stock
                                                  €105.52 Price
                                                  Pompe à eau K4M Twingo Rs R1 et R2
                                                      Pompe à eau K4M Twingo RS R1 et R2 Référence: 8200582675 Pompe à eau équipé de la poulie métallique, et non de la version en plastique moins fiable.
                                                      €105.52Price
                                                      Pompe à eau K4M Twingo Rs R1 et R2
                                                          Pompe à eau K4M Twingo RS R1 et R2 Référence: 8200582675 Pompe à eau équipé de la poulie métallique, et non de la version en plastique moins fiable.
                                                          €105.52Price
                                                          En Stock
                                                          €84.00 Price
                                                          En Stock
                                                          €84.00 Price
                                                          Original RENAULT Injector for Megane 3 RSOriginal RENAULT Injector for Megane 3 RS
                                                              Don't let your Renault Megane 3 RS lose its vigor! This original RENAULT injector is essential for maintaining your engine's optimal performance. Avoid excessive fuel consumption and a drop in power by choosing the quality and reliability of a part specifically designed for your sports vehicle. You can find associated complementary products (notably the...
                                                              €84.00Price
                                                              Original RENAULT Injector for Megane 3 RSOriginal RENAULT Injector for Megane 3 RS
                                                                  Don't let your Renault Megane 3 RS lose its vigor! This original RENAULT injector is essential for maintaining your engine's optimal performance. Avoid excessive fuel consumption and a drop in power by choosing the quality and reliability of a part specifically designed for your sports vehicle. You can find associated complementary products (notably the...
                                                                  €84.00Price
                                                                  En Stock
                                                                  €790.00 Price
                                                                  En Stock
                                                                  €790.00 Price
                                                                  Echangeur Wagner Megane 3 RSEchangeur Wagner Megane 3 RS
                                                                      Wagner Tuning Intercooler for Renault Mégane 3 RS: Boost your sports car's performance with this high-performance intercooler. Designed to efficiently cool the turbocharged air, it enhances your engine's power, torque, and reliability, while also giving your vehicle a sportier look.
                                                                      €790.00Price
                                                                      Echangeur Wagner Megane 3 RSEchangeur Wagner Megane 3 RS
                                                                          Wagner Tuning Intercooler for Renault Mégane 3 RS: Boost your sports car's performance with this high-performance intercooler. Designed to efficiently cool the turbocharged air, it enhances your engine's power, torque, and reliability, while also giving your vehicle a sportier look.
                                                                          €790.00Price
                                                                          Fuel Pump Locking Ring and Seal Kit - Renault Sport Range
                                                                              Ensure a leak-free fuel system with this genuine Renault fuel pump locking ring and seal kit . Essential for any intervention on the fuel sender unit, this kit prevents leaks and persistent fuel odors inside your sports vehicle's cabin. Includes the locking nut (ring) and the...
                                                                              €55.88Price
                                                                              Fuel Pump Locking Ring and Seal Kit - Renault Sport Range
                                                                                  Ensure a leak-free fuel system with this genuine Renault fuel pump locking ring and seal kit . Essential for any intervention on the fuel sender unit, this kit prevents leaks and persistent fuel odors inside your sports vehicle's cabin. Includes the locking nut (ring) and the...
                                                                                  €55.88Price
                                                                                  En Stock
                                                                                  €56.11 Price
                                                                                  En Stock
                                                                                  €56.11 Price
                                                                                  Électrovanne pilotée Megane 2 RSTurbo Boost Solenoid Valve Mégane 2 RS
                                                                                      Turbo Boost Control Solenoid Valve – Renault Mégane 2 RS The turbo boost control solenoid valve, reference 8200702990 , is an engine management component designed to regulate the turbocharger...
                                                                                      €56.11Price
                                                                                      Électrovanne pilotée Megane 2 RSTurbo Boost Solenoid Valve Mégane 2 RS
                                                                                          Turbo Boost Control Solenoid Valve – Renault Mégane 2 RS The turbo boost control solenoid valve, reference 8200702990 , is an engine management component designed to regulate the turbocharger...
                                                                                          €56.11Price
                                                                                          En Stock
                                                                                          €244.00 Price
                                                                                          En Stock
                                                                                          €244.00 Price
                                                                                          Wasegate Forge Megane RS
                                                                                              Dotée d'un tarage plus ferme que le modèle d'origine, elle permet une mise en action plus rapide du turbo, et une pression de sural plus stable.
                                                                                              €244.00Price
                                                                                              Wasegate Forge Megane RS
                                                                                                  Dotée d'un tarage plus ferme que le modèle d'origine, elle permet une mise en action plus rapide du turbo, et une pression de sural plus stable.
                                                                                                  €244.00Price
                                                                                                  En Stock
                                                                                                  €22.74 Price
                                                                                                  En Stock
                                                                                                  €22.74 Price
                                                                                                  Renault GLACEOL RX Type D Coolant 5LRenault GLACEOL RX Type D Coolant 5L
                                                                                                      Renault Type D Coolant – 5 L The Renault GLACEOL RX Type D coolant in a 5-litre container is an engine cooling fluid designed for compatible Renault vehicles. It helps regulate engine...
                                                                                                      €22.74Price
                                                                                                      Renault GLACEOL RX Type D Coolant 5LRenault GLACEOL RX Type D Coolant 5L
                                                                                                          Renault Type D Coolant – 5 L The Renault GLACEOL RX Type D coolant in a 5-litre container is an engine cooling fluid designed for compatible Renault vehicles. It helps regulate engine...
                                                                                                          €22.74Price
                                                                                                          En Stock
                                                                                                          €23.50 Price
                                                                                                          En Stock
                                                                                                          €23.50 Price
                                                                                                          Kit Revision Dump Valve Recirculation Forge
                                                                                                              Kit revision pour Dump Valve Forge comprenant: - 1 sachet de graisse - un piston - joints toriques 
                                                                                                              €23.50Price
                                                                                                              Kit Revision Dump Valve Recirculation Forge
                                                                                                                  Kit revision pour Dump Valve Forge comprenant: - 1 sachet de graisse - un piston - joints toriques 
                                                                                                                  €23.50Price
                                                                                                                  Durite modine/radiateur Clio 2 Cup
                                                                                                                      The Renault Sport water hose (ref. 7711154249 ) is an essential part to ensure optimal coolant circulation between the water/oil heat exchanger and the radiator of your Renault Clio 2 X65 Cup . It guarantees a stable engine temperature and optimal performance.
                                                                                                                      €77.62Price
                                                                                                                      Durite modine/radiateur Clio 2 Cup
                                                                                                                          The Renault Sport water hose (ref. 7711154249 ) is an essential part to ensure optimal coolant circulation between the water/oil heat exchanger and the radiator of your Renault Clio 2 X65 Cup . It guarantees a stable engine temperature and optimal performance.
                                                                                                                          €77.62Price
                                                                                                                          Calorstat Clio 3 RS 75°
                                                                                                                              Control your engine's temperature with this genuine Renault thermostat with an opening temperature of 75°C . Specifically designed for the Clio 3 RS , it also mounts without modification on the Clio 2 RS , allowing the cooling circuit to open more quickly. This part is essential for limiting temperature spikes and preventing the risk of engine overheating ...
                                                                                                                              €78.18Price
                                                                                                                              Calorstat Clio 3 RS 75°
                                                                                                                                  Control your engine's temperature with this genuine Renault thermostat with an opening temperature of 75°C . Specifically designed for the Clio 3 RS , it also mounts without modification on the Clio 2 RS , allowing the cooling circuit to open more quickly. This part is essential for limiting temperature spikes and preventing the risk of engine overheating ...
                                                                                                                                  €78.18Price
                                                                                                                                  En Stock
                                                                                                                                  €178.04 Price
                                                                                                                                  En Stock
                                                                                                                                  €178.04 Price
                                                                                                                                  Pompe à Essence Clio 2 RS et X65 Cup
                                                                                                                                      Fuel Gauge/Pump Module Renault Clio 2 RS (Original) Original Renault fuel gauge/pump module for Clio 2 RS Phase 2/3 (without regulator on rail) and Clio 2 X65 Cup. Ensures reliable fuel supply. Discover the compatible fixing ring and gasket at the bottom of the page.
                                                                                                                                      €178.04Price
                                                                                                                                      Pompe à Essence Clio 2 RS et X65 Cup
                                                                                                                                          Fuel Gauge/Pump Module Renault Clio 2 RS (Original) Original Renault fuel gauge/pump module for Clio 2 RS Phase 2/3 (without regulator on rail) and Clio 2 X65 Cup. Ensures reliable fuel supply. Discover the compatible fixing ring and gasket at the bottom of the page.
                                                                                                                                          €178.04Price
                                                                                                                                          Raccord Pompe à essence Clio GrN
                                                                                                                                              Renault Clio 2 Group N Fuel Pump Connector , a component intended for the fuel supply system of vehicles configured for Group N applications. Vehicle brand: Renault Model: Clio 2 Application: Group N Part type: Fuel pump connector ...
                                                                                                                                              €50.45Price
                                                                                                                                              Raccord Pompe à essence Clio GrN
                                                                                                                                                  Renault Clio 2 Group N Fuel Pump Connector , a component intended for the fuel supply system of vehicles configured for Group N applications. Vehicle brand: Renault Model: Clio 2 Application: Group N Part type: Fuel pump connector ...
                                                                                                                                                  €50.45Price
                                                                                                                                                  Fixations Forge Capteur Sur RadiateurFORGE MOTORSPORT FMRCLMP Sensor Securing Kit - Megane 2 RS
                                                                                                                                                      Secure the sensors of your Megane 2 RS with the FORGE MOTORSPORT FMRCLMP kit. Composed of 2 reinforcements, it ensures optimal support for the depression hose and pressure sensor. Avoid performance losses and reliability issues.
                                                                                                                                                      €36.80Price
                                                                                                                                                      Fixations Forge Capteur Sur RadiateurFORGE MOTORSPORT FMRCLMP Sensor Securing Kit - Megane 2 RS
                                                                                                                                                          Secure the sensors of your Megane 2 RS with the FORGE MOTORSPORT FMRCLMP kit. Composed of 2 reinforcements, it ensures optimal support for the depression hose and pressure sensor. Avoid performance losses and reliability issues.
                                                                                                                                                          €36.80Price
                                                                                                                                                          DeatschWerks 265L/H Fuel Pump (E85) for Renault Megane 2 RS
                                                                                                                                                              Secure your engine build with the DeatschWerks DW65c fuel pump , delivering a high-performance flow rate of 265L/H . Specifically engineered for the Renault Megane 2 RS , this pump offers the major advantage of being 100% E85 compatible (ethanol), making it the perfect choice for flex-fuel conversions. Its compact design allows...
                                                                                                                                                              €224.09Price
                                                                                                                                                              DeatschWerks 265L/H Fuel Pump (E85) for Renault Megane 2 RS
                                                                                                                                                                  Secure your engine build with the DeatschWerks DW65c fuel pump , delivering a high-performance flow rate of 265L/H . Specifically engineered for the Renault Megane 2 RS , this pump offers the major advantage of being 100% E85 compatible (ethanol), making it the perfect choice for flex-fuel conversions. Its compact design allows...
                                                                                                                                                                  €224.09Price
                                                                                                                                                                  Dump Valve Megane 3 RS avec Kit de montageDump Valve Megane 3 RS avec Kit de montage
                                                                                                                                                                      Kit Dump Valve Forge. Circuit ouvert. Ce mode de fonctionnement est reconnaissable au PSSCHHIIIITTT qui se laisse entendre lors du changement de rapport Le kit Comprend, la Dump Valve, 2 colliers, un raccord inox, et un tube coudé et le bouchon nécessaire à boucher le trou lors de la suppression de la dump valve d'origine (pas present dans tous les kits que l'on trouve sur le net). Idéal sur...
                                                                                                                                                                      €261.86Price
                                                                                                                                                                      Dump Valve Megane 3 RS avec Kit de montageDump Valve Megane 3 RS avec Kit de montage
                                                                                                                                                                          Kit Dump Valve Forge. Circuit ouvert. Ce mode de fonctionnement est reconnaissable au PSSCHHIIIITTT qui se laisse entendre lors du changement de rapport Le kit Comprend, la Dump Valve, 2 colliers, un raccord inox, et un tube coudé et le bouchon nécessaire à boucher le trou lors de la suppression de la dump valve d'origine (pas present dans tous les kits que l'on trouve sur le net). Idéal sur...
                                                                                                                                                                          €261.86Price
                                                                                                                                                                          Reinforced silicone intercooler boost hose kit Forge Motorsport FMKTRC for Renault Clio 4 RS. black
                                                                                                                                                                              Prevent boost pressure leaks and protect your intake system with the premium Forge Motorsport Silicon Turbo Hose Kit FMKTRC for Clio 4 RS . Manufactured from high-tensile, multi-layer reinforced silicone, this kit directly replaces factory rubber lines that are prone to...
                                                                                                                                                                              €230.39Price
                                                                                                                                                                              Reinforced silicone intercooler boost hose kit Forge Motorsport FMKTRC for Renault Clio 4 RS. black
                                                                                                                                                                                  Prevent boost pressure leaks and protect your intake system with the premium Forge Motorsport Silicon Turbo Hose Kit FMKTRC for Clio 4 RS . Manufactured from high-tensile, multi-layer reinforced silicone, this kit directly replaces factory rubber lines that are prone to...
                                                                                                                                                                                  €230.39Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €150.77 Price
                                                                                                                                                                                  En Stock
                                                                                                                                                                                  €150.77 Price
                                                                                                                                                                                  Bride de turbo Megane N4
                                                                                                                                                                                      Official Renault Megane N4 Rally Turbo Flange (Ref: 7711167131) : Original part, guaranteeing performance and reliability for your Renault Megane 3 RS prepared for competition. Don't let an unsuitable flange compromise your turbo's potential. Discover related products, including the O-ring, at the bottom of this page.
                                                                                                                                                                                      €150.77Price
                                                                                                                                                                                      Bride de turbo Megane N4
                                                                                                                                                                                          Official Renault Megane N4 Rally Turbo Flange (Ref: 7711167131) : Original part, guaranteeing performance and reliability for your Renault Megane 3 RS prepared for competition. Don't let an unsuitable flange compromise your turbo's potential. Discover related products, including the O-ring, at the bottom of this page.
                                                                                                                                                                                          €150.77Price
                                                                                                                                                                                          Bouchon Vase Expansion 1.4 BarGenuine Renault Expansion Tank Cap 1.4 Bar - Super 5 GT Turbo / Clio 16S / Williams / R21 Turbo
                                                                                                                                                                                              Safeguard your cooling system with this genuine Renault expansion tank cap rated at 1.4 Bar . Specifically engineered for legendary performance models such as the Renault Super 5 GT Turbo , Clio Williams , and R21 2L Turbo , it ensures optimal pressure regulation to prevent engine overheating. A vital precision...
                                                                                                                                                                                              €28.78Price
                                                                                                                                                                                              Bouchon Vase Expansion 1.4 BarGenuine Renault Expansion Tank Cap 1.4 Bar - Super 5 GT Turbo / Clio 16S / Williams / R21 Turbo
                                                                                                                                                                                                  Safeguard your cooling system with this genuine Renault expansion tank cap rated at 1.4 Bar . Specifically engineered for legendary performance models such as the Renault Super 5 GT Turbo , Clio Williams , and R21 2L Turbo , it ensures optimal pressure regulation to prevent engine overheating. A vital precision...
                                                                                                                                                                                                  €28.78Price