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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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Cablage liaison répartiteur sortie coupe circuit Megane N4
      Cablage liaison répartiteur sortie coupe circuit Megane N4
      €25.66Price
      Cablage liaison répartiteur sortie coupe circuit Megane N4
          Cablage liaison répartiteur sortie coupe circuit Megane N4
          €25.66Price
          Câble liaison batterie entrée coupe circuit Megane N4
              Câble liaison batterie entrée coupe circuit Megane N4
              €25.58Price
              Câble liaison batterie entrée coupe circuit Megane N4
                  Câble liaison batterie entrée coupe circuit Megane N4
                  €25.58Price
                  En Stock
                  €10.02 Price
                  En Stock
                  €10.02 Price
                  Joint de cold side
                      COLD SIDE SEAL – JTCOLD The cold side seal, reference JTCOLD , is a sealing component intended for use on the cold side of an air circuit. It helps provide an airtight connection between...
                      €10.02Price
                      Joint de cold side
                          COLD SIDE SEAL – JTCOLD The cold side seal, reference JTCOLD , is a sealing component intended for use on the cold side of an air circuit. It helps provide an airtight connection between...
                          €10.02Price
                          Kit joint torique pour régulateur de pression de rampe
                              Kit joint torique pour régulateur de pression de rampe
                              €13.08Price
                              Kit joint torique pour régulateur de pression de rampe
                                  Kit joint torique pour régulateur de pression de rampe
                                  €13.08Price
                                  Accessory Belt for AC Delete Kit - Renault Mégane 4 RS
                                      This Adapted Accessory Belt is a critical component for converting to an Air Conditioning Delete Kit on your Renault Mégane 4 RS . Its dimension is precisely defined to compensate for the removal of the AC compressor. This superior quality belt is essential for...
                                      €29.34Price
                                      Accessory Belt for AC Delete Kit - Renault Mégane 4 RS
                                          This Adapted Accessory Belt is a critical component for converting to an Air Conditioning Delete Kit on your Renault Mégane 4 RS . Its dimension is precisely defined to compensate for the removal of the AC compressor. This superior quality belt is essential for...
                                          €29.34Price
                                          En Stock
                                          €25.25 Price
                                          En Stock
                                          €25.25 Price
                                          Accessory Belt for AC Delete Kit - Alpine A110
                                              This Specific Accessory Belt is an essential component when installing an Air Conditioning Delete Kit on your Alpine A110 . Its length is adjusted to bypass the air conditioning compressor that has been removed. A high-quality part, it guarantees the correct...
                                              €25.25Price
                                              Accessory Belt for AC Delete Kit - Alpine A110
                                                  This Specific Accessory Belt is an essential component when installing an Air Conditioning Delete Kit on your Alpine A110 . Its length is adjusted to bypass the air conditioning compressor that has been removed. A high-quality part, it guarantees the correct...
                                                  €25.25Price
                                                  Borne positive batterie Megane 3 RS et N4
                                                      Ensure perfect electrical conductivity with this genuine Renault positive battery terminal . Specifically designed for the Renault Megane 3 RS and Megane N4 , this battery clamp guarantees reliable starting and a stable power supply for your onboard electronic equipment, even under intensive use. ...
                                                      €10.58Price
                                                      Borne positive batterie Megane 3 RS et N4
                                                          Ensure perfect electrical conductivity with this genuine Renault positive battery terminal . Specifically designed for the Renault Megane 3 RS and Megane N4 , this battery clamp guarantees reliable starting and a stable power supply for your onboard electronic equipment, even under intensive use. ...
                                                          €10.58Price
                                                          Specific Accessory Belt for A/C Delete Kit Renault Clio 4 RS
                                                              The Optimiz Access Specific Accessory Belt is the essential part required to finalize the installation of the A/C Delete Kit on your Renault Clio 4 RS . Due to the change in the path and distance between the pulleys following the removal of the air conditioning compressor, the original belt can...
                                                              €29.34Price
                                                              Specific Accessory Belt for A/C Delete Kit Renault Clio 4 RS
                                                                  The Optimiz Access Specific Accessory Belt is the essential part required to finalize the installation of the A/C Delete Kit on your Renault Clio 4 RS . Due to the change in the path and distance between the pulleys following the removal of the air conditioning compressor, the original belt can...
                                                                  €29.34Price
                                                                  Câble alimentation protection batterie Megane 3 RS et N4
                                                                      Câble alimentation protection batterie Megane 3 RS et N4
                                                                      €96.72Price
                                                                      Câble alimentation protection batterie Megane 3 RS et N4
                                                                          Câble alimentation protection batterie Megane 3 RS et N4
                                                                          €96.72Price
                                                                          En Stock
                                                                          €126.80 €181.14 Regular price -30% off Price
                                                                          En Stock
                                                                          €126.80 €181.14 Regular price -30% off Price
                                                                          GMV (Ventilateur) type chauffo Twingo RS et R1
                                                                              GMV (Ventilateur) type chauffo Twingo RS et R1 Référence: 7711162740 - 8200066098 Egalement compatible avec d'autres motorisations
                                                                              €126.80€181.14Regular price-30% offPrice
                                                                              GMV (Ventilateur) type chauffo Twingo RS et R1
                                                                                  GMV (Ventilateur) type chauffo Twingo RS et R1 Référence: 7711162740 - 8200066098 Egalement compatible avec d'autres motorisations
                                                                                  €126.80€181.14Regular price-30% offPrice
                                                                                  En Stock
                                                                                  €361.00 Price
                                                                                  En Stock
                                                                                  €361.00 Price
                                                                                  Kit Admisssion Forge Motorsport Megane 4 RSKit Admisssion Forge Motorsport Megane 4 RS
                                                                                      Kit Admisssion Forge Motorsport Megane 4 RS Produit developpé dans le but de  - Garder des temperatures d'admission interessantes et les plus basses possibles - Ameliorer l'afflux d'air - Ameliorer l'esthetique de la baie moteur Apres de nombreux essais, les resultats obtenus sont + 15ch Ce gain peut etre superieur en associant ce kit...
                                                                                      €361.00Price
                                                                                      Kit Admisssion Forge Motorsport Megane 4 RSKit Admisssion Forge Motorsport Megane 4 RS
                                                                                          Kit Admisssion Forge Motorsport Megane 4 RS Produit developpé dans le but de  - Garder des temperatures d'admission interessantes et les plus basses possibles - Ameliorer l'afflux d'air - Ameliorer l'esthetique de la baie moteur Apres de nombreux essais, les resultats obtenus sont + 15ch Ce gain peut etre superieur en associant ce kit...
                                                                                          €361.00Price
                                                                                          Upgrade conduit admission forge avec adaptateur Megane 4 RSUpgrade conduit admission forge avec adaptateur Megane 4 RS
                                                                                              Upgrade conduit admission forge avec adaptateur Megane 4 RS. Produit developpé pour supprimer la restriction d'origine de l'admission. Bien qu'apportant deja un plus sur une voiture d'origine, ce produit a encore plus d'interet en cas de vehicule reprogrammé
                                                                                              €187.01Price
                                                                                              Upgrade conduit admission forge avec adaptateur Megane 4 RSUpgrade conduit admission forge avec adaptateur Megane 4 RS
                                                                                                  Upgrade conduit admission forge avec adaptateur Megane 4 RS. Produit developpé pour supprimer la restriction d'origine de l'admission. Bien qu'apportant deja un plus sur une voiture d'origine, ce produit a encore plus d'interet en cas de vehicule reprogrammé
                                                                                                  €187.01Price
                                                                                                  En Stock
                                                                                                  €32.92 Price
                                                                                                  En Stock
                                                                                                  €32.92 Price
                                                                                                  Rampe injection Clio 2 RS 172 phase 2 et 182
                                                                                                      Fuel injection rail Renault Clio 2 RS Phase 2 & 3 Give your Renault Clio 2 RS Phase 2 or 3 an optimum fuel supply with the genuine Renault injection rail! Designed for sports driving enthusiasts, this rail guarantees a constant and precise fuel flow, even at high engine speeds, for optimum performance and an unrivalled driving experience. ...
                                                                                                      €32.92Price
                                                                                                      Rampe injection Clio 2 RS 172 phase 2 et 182
                                                                                                          Fuel injection rail Renault Clio 2 RS Phase 2 & 3 Give your Renault Clio 2 RS Phase 2 or 3 an optimum fuel supply with the genuine Renault injection rail! Designed for sports driving enthusiasts, this rail guarantees a constant and precise fuel flow, even at high engine speeds, for optimum performance and an unrivalled driving experience. ...
                                                                                                          €32.92Price
                                                                                                          Vis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RSVis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RS
                                                                                                              Vis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RS. Vendue à l'unité - 3 Vis sont nécessaires
                                                                                                              €2.34Price
                                                                                                              Vis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RSVis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RS
                                                                                                                  Vis de fixation poulie folle clim Clio 3 RS - Megane 2 RS - Megane 3 RS. Vendue à l'unité - 3 Vis sont nécessaires
                                                                                                                  €2.34Price
                                                                                                                  Régulateur (membrane) pression gaz collecteur admission Clio 3 RS
                                                                                                                      Régulateur pression gaz carter Clio 3 RS
                                                                                                                      €61.60Price
                                                                                                                      Régulateur (membrane) pression gaz collecteur admission Clio 3 RS
                                                                                                                          €61.60Price
                                                                                                                          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
                                                                                                                                  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
                                                                                                                                          €17.45 Price
                                                                                                                                          En Stock
                                                                                                                                          €17.45 Price
                                                                                                                                          Support inférieur écope boitier filtre Twingo R2
                                                                                                                                              Support inférieur écope boitier filtre Twingo R2 Référence: 7711167597
                                                                                                                                              €17.45Price
                                                                                                                                              Support inférieur écope boitier filtre Twingo R2
                                                                                                                                                  Support inférieur écope boitier filtre Twingo R2 Référence: 7711167597
                                                                                                                                                  €17.45Price
                                                                                                                                                  Dispo selon configuration
                                                                                                                                                  €199.00 Price
                                                                                                                                                  Dispo selon configuration
                                                                                                                                                  €199.00 Price
                                                                                                                                                  Admission Forge Clio 4 RS Euro 6Admission Forge Clio 4 RS Euro 6
                                                                                                                                                      Ce kit est spécialement conçu pour la Renault Clio 4 RS Trophy (ne convient pas aux clio 4 RS non Trophy) Il comprend le tuyau de silicone conçu sur mesure combiné avec un haut débit filtre de cône non huilée en coton permettant une excellente filtration. Tout le nécessaire est fourni dans le kit, y compris les colliers en acier inoxydable de qualité. Ce kit a été testé et permet un gain...
                                                                                                                                                      €199.00Price
                                                                                                                                                      Admission Forge Clio 4 RS Euro 6Admission Forge Clio 4 RS Euro 6
                                                                                                                                                          Ce kit est spécialement conçu pour la Renault Clio 4 RS Trophy (ne convient pas aux clio 4 RS non Trophy) Il comprend le tuyau de silicone conçu sur mesure combiné avec un haut débit filtre de cône non huilée en coton permettant une excellente filtration. Tout le nécessaire est fourni dans le kit, y compris les colliers en acier inoxydable de qualité. Ce kit a été testé et permet un gain...
                                                                                                                                                          €199.00Price
                                                                                                                                                          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
                                                                                                                                                                  En Stock
                                                                                                                                                                  €10.57 €13.93 Regular price -€3.36 off Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €10.57 €13.93 Regular price -€3.36 off Price
                                                                                                                                                                  Joint Collecteur Admission Clio 2 RS
                                                                                                                                                                      Ensure vital engine sealing with this genuine Renault intake manifold gasket for the Clio 2 RS (172 and 182hp). This authentic component guarantees a perfect junction between the cylinder head and your manifold, preventing any parasitic air leaks that could degrade the performance of your F4R engine . Do not...
                                                                                                                                                                      €10.57€13.93Regular price-€3.36 offPrice
                                                                                                                                                                      Joint Collecteur Admission Clio 2 RS
                                                                                                                                                                          Ensure vital engine sealing with this genuine Renault intake manifold gasket for the Clio 2 RS (172 and 182hp). This authentic component guarantees a perfect junction between the cylinder head and your manifold, preventing any parasitic air leaks that could degrade the performance of your F4R engine . Do not...
                                                                                                                                                                          €10.57€13.93Regular price-€3.36 offPrice
                                                                                                                                                                          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
                                                                                                                                                                                  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
                                                                                                                                                                                      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