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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: Support moteur
  • Categories: Suralimentation (Turbo)
En Stock
€221.33 Price
En Stock
€221.33 Price
Radiator Outlet Water Hose Renault Megane 3 RSRadiator Outlet Water Hose Renault Megane 3 RS
      Genuine Renault Radiator Outlet Water Hose for Renault Megane 3 RS. Essential part for optimal engine cooling. Renault quality and reliability.
      €221.33Price
      Radiator Outlet Water Hose Renault Megane 3 RSRadiator Outlet Water Hose Renault Megane 3 RS
          Genuine Renault Radiator Outlet Water Hose for Renault Megane 3 RS. Essential part for optimal engine cooling. Renault quality and reliability.
          €221.33Price
          En Stock
          €720.00 Price
          En Stock
          €720.00 Price
          Echangeur Airtec Megane 3 RSEchangeur Airtec Megane 3 RS
              Échangeur Airtec spécifique à la Mégane 3 RS. Échangeur de 60 mm se montant en lieu et place sans modifications et équipé d'une tôle permettant de diriger un plus gros flux d'air vers l’échangeur. Disponible en gris
              €720.00Price
              Echangeur Airtec Megane 3 RSEchangeur Airtec Megane 3 RS
                  Échangeur Airtec spécifique à la Mégane 3 RS. Échangeur de 60 mm se montant en lieu et place sans modifications et équipé d'une tôle permettant de diriger un plus gros flux d'air vers l’échangeur. Disponible en gris
                  €720.00Price
                  Pompe essence modifiée Clio Gr NModified Fuel Pump DASH Fitting Renault Sport for Renault Clio 2 Gr N (7711129520)
                    • Pack
                    Do not take the risk of seeing the performance of your Renault Clio 2 Group N drop sharply. Without a stable and optimal fuel supply, you lose your advantage on the track. This modified fuel pump (Reference 7711129520 ) is the official Renault Sport part essential for maintaining...
                    €269.74Price
                    Pompe essence modifiée Clio Gr NModified Fuel Pump DASH Fitting Renault Sport for Renault Clio 2 Gr N (7711129520)
                      • Pack
                      Do not take the risk of seeing the performance of your Renault Clio 2 Group N drop sharply. Without a stable and optimal fuel supply, you lose your advantage on the track. This modified fuel pump (Reference 7711129520 ) is the official Renault Sport part essential for maintaining...
                      €269.74Price
                      Kit Complet Durites D'eau Clio 3 RSKit Complet Durites D'eau Clio 3 RS
                          Kit complet de durites d'eau pour Clio 3 RS. Convient à toutes les Clio 3 RS Ce kit vient en lieu et place des durites d'origine et les remplacent avantageusement.
                          €445.18Price
                          Kit Complet Durites D'eau Clio 3 RSKit Complet Durites D'eau Clio 3 RS
                              Kit complet de durites d'eau pour Clio 3 RS. Convient à toutes les Clio 3 RS Ce kit vient en lieu et place des durites d'origine et les remplacent avantageusement.
                              €445.18Price
                              Genuine Renault Sport throttle position potentiometer for Twingo R2, Clio R3, and X85 Cup racing engines.
                                  Do not risk unpredictable ignition cuts during a rally stage, a sudden loss of immediate throttle response, or an abrupt limp-mode activation that freezes your lap times on track. The genuine Potentiomètre papillon Twingo R2, Clio R3 et X85 Cup is the official factory-spec...
                                  €138.05Price
                                  Genuine Renault Sport throttle position potentiometer for Twingo R2, Clio R3, and X85 Cup racing engines.
                                      Do not risk unpredictable ignition cuts during a rally stage, a sudden loss of immediate throttle response, or an abrupt limp-mode activation that freezes your lap times on track. The genuine Potentiomètre papillon Twingo R2, Clio R3 et X85 Cup is the official factory-spec...
                                      €138.05Price
                                      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
                                              Pompe à eau Origine Renault Clio 3 RS - Megane 2 RS - Megane 3 RSGenuine OEM Water Pump - Renault Clio 3 RS / Megane 2/3 RS
                                                  Safeguard the mechanical reliability and thermal efficiency of your high-performance engine with the Genuine Renault Sport Water Pump for F4R and F4Rt engines . This authentic factory replacement component is essential to ensure optimum coolant circulation under intense road...
                                                  €117.43Price
                                                  Pompe à eau Origine Renault Clio 3 RS - Megane 2 RS - Megane 3 RSGenuine OEM Water Pump - Renault Clio 3 RS / Megane 2/3 RS
                                                      Safeguard the mechanical reliability and thermal efficiency of your high-performance engine with the Genuine Renault Sport Water Pump for F4R and F4Rt engines . This authentic factory replacement component is essential to ensure optimum coolant circulation under intense road...
                                                      €117.43Price
                                                      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
                                                              €689.93 Price
                                                              En Stock
                                                              €689.93 Price
                                                              Durite inférieure radiateur Clio 2 Rs et Cup
                                                                  Durite inférieure radiateur Clio 2 Cup Référence: 7711155360
                                                                  €689.93Price
                                                                  Durite inférieure radiateur Clio 2 Rs et Cup
                                                                      Durite inférieure radiateur Clio 2 Cup Référence: 7711155360
                                                                      €689.93Price
                                                                      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
                                                                              €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
                                                                                      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
                                                                                              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
                                                                                                      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
                                                                                                              High-tensile steel replacement tuning preload spring for Forge Motorsport dump valves.
                                                                                                                  Prevent boost pressure leaks and excessive throttle response lag on your turbocharged engine block. This premium Forge Dump Valve Preload Spring features an uprated mechanical rating designed specifically to maintain the internal piston seal of your bypass valve under high...
                                                                                                                  €10.93Price
                                                                                                                  High-tensile steel replacement tuning preload spring for Forge Motorsport dump valves.
                                                                                                                      Prevent boost pressure leaks and excessive throttle response lag on your turbocharged engine block. This premium Forge Dump Valve Preload Spring features an uprated mechanical rating designed specifically to maintain the internal piston seal of your bypass valve under high...
                                                                                                                      €10.93Price
                                                                                                                      En Stock
                                                                                                                      €122.62 Price
                                                                                                                      En Stock
                                                                                                                      €122.62 Price
                                                                                                                      Batterie sèche 12V-24Ah
                                                                                                                          Batterie sèche 12V-24Ah Référence: 7711127895 Durée de vie en floating jusqu'à 5 ans Batterie VRLA d'usage général Grilles plomb-calcium pour une durée de vie améliorée Construction en fibres de verre microporeuses sans acide libre Recombinaison de gaz Fabriqué dans le monde entier Bonne récupération d'une décharge...
                                                                                                                          €122.62Price
                                                                                                                          Batterie sèche 12V-24Ah
                                                                                                                              Batterie sèche 12V-24Ah Référence: 7711127895 Durée de vie en floating jusqu'à 5 ans Batterie VRLA d'usage général Grilles plomb-calcium pour une durée de vie améliorée Construction en fibres de verre microporeuses sans acide libre Recombinaison de gaz Fabriqué dans le monde entier Bonne récupération d'une décharge...
                                                                                                                              €122.62Price
                                                                                                                              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
                                                                                                                                      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
                                                                                                                                              Dispo selon configuration
                                                                                                                                              €65.11 Price
                                                                                                                                              Dispo selon configuration
                                                                                                                                              €65.11 Price
                                                                                                                                              T de raccord de Dump Megane 2 RS
                                                                                                                                                  T de marque Forge pour le raccord de Dump Valve (Diametre de liaison 25mm)
                                                                                                                                                  €65.11Price
                                                                                                                                                  T de raccord de Dump Megane 2 RS
                                                                                                                                                      T de marque Forge pour le raccord de Dump Valve (Diametre de liaison 25mm)
                                                                                                                                                      €65.11Price
                                                                                                                                                      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
                                                                                                                                                              €59.00 €69.41 Regular price -15% off Price
                                                                                                                                                              En Stock
                                                                                                                                                              €59.00 €69.41 Regular price -15% off Price
                                                                                                                                                              Fuel Injector Genuine Renault Clio 2 RS / Gr.N / CupFuel Injector Genuine Renault Clio 2 RS / Gr.N / Cup
                                                                                                                                                                  Protect your engine's health with this genuine Renault injector specifically designed for the Clio 2 RS . This authentic part features the ITG M60 marking, guaranteeing optimal fuel atomization for high-performance 2.0 16v engines. Brand new and original Renault ...
                                                                                                                                                                  €59.00€69.41Regular price-15% offPrice
                                                                                                                                                                  Fuel Injector Genuine Renault Clio 2 RS / Gr.N / CupFuel Injector Genuine Renault Clio 2 RS / Gr.N / Cup
                                                                                                                                                                      Protect your engine's health with this genuine Renault injector specifically designed for the Clio 2 RS . This authentic part features the ITG M60 marking, guaranteeing optimal fuel atomization for high-performance 2.0 16v engines. Brand new and original Renault ...
                                                                                                                                                                      €59.00€69.41Regular price-15% offPrice
                                                                                                                                                                      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
                                                                                                                                                                              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
                                                                                                                                                                                      €279.71 Price
                                                                                                                                                                                      En Stock
                                                                                                                                                                                      €279.71 Price
                                                                                                                                                                                      Kit 11 Durites Silicone Super 5 GT TURBO Ph 2Kit 11 Durites Silicone Super 5 GT TURBO Ph 2
                                                                                                                                                                                          Kit de 11 Durites Silicones pour Super 5 GT Turbo Phase 2 Noir mat afin de rester dans l'esprit d'origine de la voiture Parfait pour une restoration
                                                                                                                                                                                          €279.71Price
                                                                                                                                                                                          Kit 11 Durites Silicone Super 5 GT TURBO Ph 2Kit 11 Durites Silicone Super 5 GT TURBO Ph 2
                                                                                                                                                                                              Kit de 11 Durites Silicones pour Super 5 GT Turbo Phase 2 Noir mat afin de rester dans l'esprit d'origine de la voiture Parfait pour une restoration
                                                                                                                                                                                              €279.71Price
                                                                                                                                                                                              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