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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.

Active filters

  • Categories: Circuit d'air
  • Categories: Circuit d'eau
  • Categories: Entretien
  • Categories: Suralimentation (Turbo)
Dispo selon configuration
€169.00 €209.02 Regular price -€40.02 off Price
Dispo selon configuration
€169.00 €209.02 Regular price -€40.02 off Price
COLD SIDE Clio 4 RS (conduit d'air renforcé)Uprated Cold Side Boost Pipe Kit - Renault Clio 4 RS
    • Pack
    Protect your turbocharging system against pressure drops with the high-performance Cold Side Kit for the Renault Clio 4 RS (Uprated Air Guide Pipe) . This reinforced intake hose replaces the fragile factory plastic pipe that is prone to cracking, optimizing cold airflow...
    €169.00€209.02Regular price-€40.02 offPrice
    COLD SIDE Clio 4 RS (conduit d'air renforcé)Uprated Cold Side Boost Pipe Kit - Renault Clio 4 RS
      • Pack
      Protect your turbocharging system against pressure drops with the high-performance Cold Side Kit for the Renault Clio 4 RS (Uprated Air Guide Pipe) . This reinforced intake hose replaces the fragile factory plastic pipe that is prone to cracking, optimizing cold airflow...
      €169.00€209.02Regular price-€40.02 offPrice
      En Stock
      €8.52 €11.03 Regular price -€2.51 off Price
      En Stock
      €8.52 €11.03 Regular price -€2.51 off Price
      Filtre à huile Megane 3 RSFiltre à huile Megane 3 RS
          The Mégane 3 RS oil filter provides optimal protection and performance for your engine, ensuring efficient filtration of impurities and long-lasting durability , even in the most demanding conditions.
          €8.52€11.03Regular price-€2.51 offPrice
          Filtre à huile Megane 3 RSFiltre à huile Megane 3 RS
              The Mégane 3 RS oil filter provides optimal protection and performance for your engine, ensuring efficient filtration of impurities and long-lasting durability , even in the most demanding conditions.
              €8.52€11.03Regular price-€2.51 offPrice
              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
                      Joint anti-usure jonction écope divergent Twingo R2
                          Joint anti-usure jonction écope divergent Twingo R2 Référence: 7711167594
                          €8.48Price
                          Joint anti-usure jonction écope divergent Twingo R2
                              Joint anti-usure jonction écope divergent Twingo R2 Référence: 7711167594
                              €8.48Price
                              En Stock
                              €28.80 Price
                              En Stock
                              €28.80 Price
                              Courroie accessoire Clio Gr N ou Rs avec montage type Ragnotti
                                  Renault Clio R3 Max Accessory Belt (128mm Pulley) High-performance accessory belt for Renault Clio R3 Max with 128mm crankshaft pulley. Optimize your race Clio's transmission. Discover complementary products at the bottom of the page.
                                  €28.80Price
                                  Courroie accessoire Clio Gr N ou Rs avec montage type Ragnotti
                                      Renault Clio R3 Max Accessory Belt (128mm Pulley) High-performance accessory belt for Renault Clio R3 Max with 128mm crankshaft pulley. Optimize your race Clio's transmission. Discover complementary products at the bottom of the page.
                                      €28.80Price
                                      Bidon de 5L de ELF HTX Collection 20w50ELF HTX Collection 20w50 5L - Porsche & Alpine Classic
                                          Protect the original powertrain of your automotive icon with ELF HTX Collection 20w50 mineral engine oil in a 5L jug . Specifically formulated for vintage mechanics and classic historic engines, this high-end formula guarantees consistent oil pressure and unmatched...
                                          €63.62Price
                                          Bidon de 5L de ELF HTX Collection 20w50ELF HTX Collection 20w50 5L - Porsche & Alpine Classic
                                              Protect the original powertrain of your automotive icon with ELF HTX Collection 20w50 mineral engine oil in a 5L jug . Specifically formulated for vintage mechanics and classic historic engines, this high-end formula guarantees consistent oil pressure and unmatched...
                                              €63.62Price
                                              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
                                                  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
                                                      Pige de Calage Vilebrequin F4R Clio RS Megane RS
                                                          Prevent catastrophic engine failure during your timing belt replacement with this professional-grade Crankshaft Timing Pin F4R Clio RS Megane RS . Engineered specifically to match the official factory blueprints of Renault Sport power units, this high-tensile steel tool...
                                                          €41.40Price
                                                          Pige de Calage Vilebrequin F4R Clio RS Megane RS
                                                              Prevent catastrophic engine failure during your timing belt replacement with this professional-grade Crankshaft Timing Pin F4R Clio RS Megane RS . Engineered specifically to match the official factory blueprints of Renault Sport power units, this high-tensile steel tool...
                                                              €41.40Price
                                                              Dispo selon configuration
                                                              €67.23 €74.70 Regular price -10% off Price
                                                              Dispo selon configuration
                                                              €67.23 €74.70 Regular price -10% off Price
                                                              Kit Vidange Elf SXR 5w40 Clio 4 RS - Megane 4 GTKit Vidange Elf SXR 5w40 Clio 4 RS - Megane 4 GT
                                                                • Pack
                                                                Kit Vidange Elf Evolution SXR comprenant 3 bidons de 2 Litres d'huile Elf Evolution SXR 5w40 (préconisation Constructeur), 1 filtre à huile Renault et 1 joint de vidange
                                                                €67.23€74.70Regular price-10% offPrice
                                                                Kit Vidange Elf SXR 5w40 Clio 4 RS - Megane 4 GTKit Vidange Elf SXR 5w40 Clio 4 RS - Megane 4 GT
                                                                  • Pack
                                                                  Kit Vidange Elf Evolution SXR comprenant 3 bidons de 2 Litres d'huile Elf Evolution SXR 5w40 (préconisation Constructeur), 1 filtre à huile Renault et 1 joint de vidange
                                                                  €67.23€74.70Regular price-10% offPrice
                                                                  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
                                                                          Mecacyl CR 100 ml
                                                                              Protect your high-performance engine's internal components with the Mecacyl CR 100 ml engine hyper-lubricant. This unique surface treatment mixes directly with your fresh oil to drastically reduce internal friction, lower operating temperatures, and optimize engine...
                                                                              €28.50Price
                                                                              Mecacyl CR 100 ml
                                                                                  Protect your high-performance engine's internal components with the Mecacyl CR 100 ml engine hyper-lubricant. This unique surface treatment mixes directly with your fresh oil to drastically reduce internal friction, lower operating temperatures, and optimize engine...
                                                                                  €28.50Price
                                                                                  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
                                                                                          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
                                                                                                          €13.20 Price
                                                                                                          En Stock
                                                                                                          €13.20 Price
                                                                                                          Joint Plenum Clio 3 RSJoint Plenum Clio 3 RS
                                                                                                              Joint Plenum Clio 3 RS Joint permettant de faire l’étanchéité entre le moteur et le collecteur d'admission. Il est conseillé de le changer lors à chaque démontage
                                                                                                              €13.20Price
                                                                                                              Joint Plenum Clio 3 RSJoint Plenum Clio 3 RS
                                                                                                                  Joint Plenum Clio 3 RS Joint permettant de faire l’étanchéité entre le moteur et le collecteur d'admission. Il est conseillé de le changer lors à chaque démontage
                                                                                                                  €13.20Price
                                                                                                                  Jeu durites Eau Silicone Forge Clio 2 RSJeu durites Eau Silicone Forge Clio 2 RS
                                                                                                                      Jeu de 6 durites Silicone Forge. Ce kit remplace avantageusement les durites d'origines de la voiture car beaucoup plus résistantes. Apporte également un look visuel racing à votre moteur.
                                                                                                                      €317.09Price
                                                                                                                      Jeu durites Eau Silicone Forge Clio 2 RSJeu durites Eau Silicone Forge Clio 2 RS
                                                                                                                          Jeu de 6 durites Silicone Forge. Ce kit remplace avantageusement les durites d'origines de la voiture car beaucoup plus résistantes. Apporte également un look visuel racing à votre moteur.
                                                                                                                          €317.09Price
                                                                                                                          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
                                                                                                                                  Outil de blocage Poulie Arbres à cames F4R Clio RS Megane RSOutil de blocage Poulie Arbres à cames F4R Clio RS Megane RS
                                                                                                                                      Véritable outil d'origine pour le blocage des poulies d'arbres à cames nécessaire pour le remplacement de la distribution pour les moteurs F4R de Clio 2 RS, Clio 3 RS, Megane 2 RS, Megane 3 RS. Kit Spécifique au F4R Renault Sport
                                                                                                                                      €139.02Price
                                                                                                                                      Outil de blocage Poulie Arbres à cames F4R Clio RS Megane RSOutil de blocage Poulie Arbres à cames F4R Clio RS Megane RS
                                                                                                                                          Véritable outil d'origine pour le blocage des poulies d'arbres à cames nécessaire pour le remplacement de la distribution pour les moteurs F4R de Clio 2 RS, Clio 3 RS, Megane 2 RS, Megane 3 RS. Kit Spécifique au F4R Renault Sport
                                                                                                                                          €139.02Price
                                                                                                                                          Motul Engine Flush 300mL Pre-Oil Change for Sports Engines
                                                                                                                                              Optimize your engine's health with Motul Engine Flush (300mL). This high-performance pre-oil change treatment is essential for removing deposits, sludge, and combustion residues before introducing fresh oil. Specially formulated for performance...
                                                                                                                                              €10.75Price
                                                                                                                                              Motul Engine Flush 300mL Pre-Oil Change for Sports Engines
                                                                                                                                                  Optimize your engine's health with Motul Engine Flush (300mL). This high-performance pre-oil change treatment is essential for removing deposits, sludge, and combustion residues before introducing fresh oil. Specially formulated for performance...
                                                                                                                                                  €10.75Price
                                                                                                                                                  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
                                                                                                                                                          Durite Forge Admission Megane 2 RSForge Silicone Intake Hose Megane 2 RS
                                                                                                                                                              Forge Motorsport Silicone Intake Hose for Renault Megane 2 RS Optimize the airflow to your Renault Megane 2 RS engine with this high-quality silicone intake hose from Forge Motorsport (ref: FMRMBHS). Available in several colors. Connects to the throttle body. Discover associated products at the bottom of the page.
                                                                                                                                                              €44.99Price
                                                                                                                                                              Durite Forge Admission Megane 2 RSForge Silicone Intake Hose Megane 2 RS
                                                                                                                                                                  Forge Motorsport Silicone Intake Hose for Renault Megane 2 RS Optimize the airflow to your Renault Megane 2 RS engine with this high-quality silicone intake hose from Forge Motorsport (ref: FMRMBHS). Available in several colors. Connects to the throttle body. Discover associated products at the bottom of the page.
                                                                                                                                                                  €44.99Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €197.06 Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €197.06 Price
                                                                                                                                                                  Poulie de dephasage Clio 3 RS - Megane 3 RSPoulie de dephasage Clio 3 RS - Megane 3 RS
                                                                                                                                                                      Poulie de déphasage Veritable Produit Renault vendu dans sa boite
                                                                                                                                                                      €197.06Price
                                                                                                                                                                      Poulie de dephasage Clio 3 RS - Megane 3 RSPoulie de dephasage Clio 3 RS - Megane 3 RS
                                                                                                                                                                          Poulie de déphasage Veritable Produit Renault vendu dans sa boite
                                                                                                                                                                          €197.06Price
                                                                                                                                                                          Echangeur air/air Megane 3 RS et N4Genuine Renault Air/Air Intercooler for Mégane 3 RS and N4
                                                                                                                                                                              Don't accept any loss of performance for your Mégane 3 RS or Mégane N4 ! This strictly genuine Renault air/air intercooler is the cornerstone for maintaining your engine's power and reliability. Without it, your sports vehicle risks never reaching its full potential, especially in extreme conditions. Find complementary products at the bottom...
                                                                                                                                                                              €493.96Price
                                                                                                                                                                              Echangeur air/air Megane 3 RS et N4Genuine Renault Air/Air Intercooler for Mégane 3 RS and N4
                                                                                                                                                                                  Don't accept any loss of performance for your Mégane 3 RS or Mégane N4 ! This strictly genuine Renault air/air intercooler is the cornerstone for maintaining your engine's power and reliability. Without it, your sports vehicle risks never reaching its full potential, especially in extreme conditions. Find complementary products at the bottom...
                                                                                                                                                                                  €493.96Price
                                                                                                                                                                                  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
                                                                                                                                                                                          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
                                                                                                                                                                                                  €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
                                                                                                                                                                                                          Collection Entrainement pompe à huile Clio 2 RS, Gr N et X65Cup
                                                                                                                                                                                                              Collection Entrainement pompe à huile Clio 2 RS, Gr N et X65Cup
                                                                                                                                                                                                              €54.25Price
                                                                                                                                                                                                              Collection Entrainement pompe à huile Clio 2 RS, Gr N et X65Cup
                                                                                                                                                                                                                  Collection Entrainement pompe à huile Clio 2 RS, Gr N et X65Cup
                                                                                                                                                                                                                  €54.25Price
                                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                                  €112.69 Price
                                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                                  €112.69 Price
                                                                                                                                                                                                                  Vis de Culasse (x10)
                                                                                                                                                                                                                      Ensemble de vis de culasse pour Clio 3 RS, Megane 2 RS, Megane 3 RS, Clio 2 RS et Megane 2 RS Véritable produit d'origine
                                                                                                                                                                                                                      €112.69Price
                                                                                                                                                                                                                      Vis de Culasse (x10)
                                                                                                                                                                                                                          Ensemble de vis de culasse pour Clio 3 RS, Megane 2 RS, Megane 3 RS, Clio 2 RS et Megane 2 RS Véritable produit d'origine
                                                                                                                                                                                                                          €112.69Price