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Drivetrain & Sports Gearbox Parts


Optimize Your Drivetrain: More Power, More Pleasure

At Optimiz Access, we offer custom-tailored solutions for a more efficient, direct, and responsive drivetrain. Whether you are aiming to put power down on the track or achieve sharper gear selection in daily driving, upgrading your transmission system unlocks the full potential of your sports vehicle.

Key benefits of an optimized drivetrain: faster and more precise gear shifts for dynamic driving, improved torque distribution for maximum traction, enhanced component reliability, and custom setups suited to all driving styles.

Essential Components for Gearboxes and Differentials

Our lineup brings together all the essential precision parts needed to maximize power transfer to the road:

  • Clutches & Flywheels – Reinforced clutch kits, single-mass race flywheels, and high-friction materials built to handle high torque output.
  • LSDs & Differentials – Limited-slip differentials designed to eliminate wheelspin and maximize exit traction.
  • Shifters & Short Shifters – Precision short-throw shifters delivering crisp, rapid gear engagements.
  • Final Drive Gears – Shorter ring and pinion gear sets providing explosive acceleration and mid-range response.
  • Gearbox Oils & Bearings – High-performance synthetic gear oils and heavy-duty bearings engineered to protect gears under load.

Benchmark Brands and Trusted Partners

We work with the most respected motorsport manufacturers in the industry: CAE Racing, Sadev, Quaife, 4Tech Shifter, Helix, SACHS Performance, and TTV Racing. We also stock OEM factory parts to cover all your routine maintenance, servicing, and drivetrain overhauls.

Why Choose Optimiz Access for Your Drivetrain?

Since 2010, Optimiz Access has specialized in the custom upgrading and maintenance of sports and premium vehicles. By relying on us, you gain expert technical advice, high-precision components, and professional installation in our workshop in northern France (Hauts-de-France) — near Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin. We ensure strict quality control along with fast worldwide shipping.

Gear Up and Boost Your Sports Car's Traction Today

Don't let your engine's power go to waste. Trust the expertise of Optimiz Access, select your transmission hardware today, and take advantage of our fast dispatch to get your vehicle build underway.

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  • Categories: Bearings
  • Categories: Drive Shafts
  • Categories: Short Bridge
Entraineur de cardan droit Clio Gr N Phase 1SADEV Right Drive Flange F1903162 - Clio 2 Gr N Phase 1 ST66 Gearbox
      The SADEV Right Drive Flange (F1903162) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the right driveshaft. A specific and essential component for the Renault Clio 2 Group N Phase 1 . A...
      €934.62Price
      Entraineur de cardan droit Clio Gr N Phase 1SADEV Right Drive Flange F1903162 - Clio 2 Gr N Phase 1 ST66 Gearbox
          The SADEV Right Drive Flange (F1903162) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the right driveshaft. A specific and essential component for the Renault Clio 2 Group N Phase 1 . A...
          €934.62Price
          Couple 12X53 long - grosses cannelures Twingo R2 7711167608
              Optimize your transmission's top speed with the 12X53 Long Final Drive (large splines) specifically developed for the Twingo R2 . This crown wheel and pinion set, available under reference 7711167608 , is the ideal solution to adapt your final...
              €1,810.32Price
              Couple 12X53 long - grosses cannelures Twingo R2 7711167608
                  Optimize your transmission's top speed with the 12X53 Long Final Drive (large splines) specifically developed for the Twingo R2 . This crown wheel and pinion set, available under reference 7711167608 , is the ideal solution to adapt your final...
                  €1,810.32Price
                  En Stock
                  €2.26 Price
                  En Stock
                  €2.26 Price
                  Ø40 External Circlip Renault Clio Group N 0601010
                      Avoid transmission issues caused by a worn or deformed retaining ring during maintenance of your competition vehicle. The Ø40 external circlip for Clio Group N , sold under reference 0601010 , is intended for Renault Clio 2 Group N ...
                      €2.26Price
                      Ø40 External Circlip Renault Clio Group N 0601010
                          Avoid transmission issues caused by a worn or deformed retaining ring during maintenance of your competition vehicle. The Ø40 external circlip for Clio Group N , sold under reference 0601010 , is intended for Renault Clio 2 Group N ...
                          €2.26Price
                          Tulipe droite Clio 3 Cup
                              The SADEV Right Side Output Flange (references F1908351 / 7711160349 ) is the gearbox output element that ensures the connection between the differential and the driveshaft (Lobro type) of your right-hand transmission. An indispensable part of the SADEV ST75 sequential gearbox , it is homologated for the...
                              €338.34Price
                              Tulipe droite Clio 3 Cup
                                  The SADEV Right Side Output Flange (references F1908351 / 7711160349 ) is the gearbox output element that ensures the connection between the differential and the driveshaft (Lobro type) of your right-hand transmission. An indispensable part of the SADEV ST75 sequential gearbox , it is homologated for the...
                                  €338.34Price
                                  En Stock
                                  €1.75 Price
                                  En Stock
                                  €1.75 Price
                                  Anneau d'arret transmission circlips Twingo R2
                                      Anneau d'arret transmission circlips Twingo R2 Référence: 7711167345
                                      €1.75Price
                                      Anneau d'arret transmission circlips Twingo R2
                                          Anneau d'arret transmission circlips Twingo R2 Référence: 7711167345
                                          €1.75Price
                                          En Stock
                                          €1,145.76 Price
                                          En Stock
                                          €1,145.76 Price
                                          Left Evo reinforced driveshaft CV axle Renault Sport Megane N4 SADEV ref 7711167653
                                              Don't risk driveshaft failure or loss of traction during a rally stage or track day. The genuine Renault Sport / SADEV left evolved (Evo) driveshaft (Reference: 7711167653) is specifically engineered to handle high torque output and extreme mechanical stress on the...
                                              €1,145.76Price
                                              Left Evo reinforced driveshaft CV axle Renault Sport Megane N4 SADEV ref 7711167653
                                                  Don't risk driveshaft failure or loss of traction during a rally stage or track day. The genuine Renault Sport / SADEV left evolved (Evo) driveshaft (Reference: 7711167653) is specifically engineered to handle high torque output and extreme mechanical stress on the...
                                                  €1,145.76Price
                                                  Dispo selon configuration
                                                  €1,414.73 €1,768.42 Regular price -20% off Price
                                                  Dispo selon configuration
                                                  €1,414.73 €1,768.42 Regular price -20% off Price
                                                  Transmission droite Twingo R2 EVOTransmission droite Twingo R2 EVO
                                                    • Pack
                                                    Transmission droite Twingo R2 EVO
                                                    €1,414.73€1,768.42Regular price-20% offPrice
                                                    Transmission droite Twingo R2 EVOTransmission droite Twingo R2 EVO
                                                      • Pack
                                                      Transmission droite Twingo R2 EVO
                                                      €1,414.73€1,768.42Regular price-20% offPrice
                                                      Entraineur gauche Ragnotti Clio Gr N
                                                          The SADEV Left Drive Flange (7711129608 / F1903157) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the driveshaft. A crucial link in the kinematic chain of your Renault Clio 2 Group N . A...
                                                          €806.15Price
                                                          Entraineur gauche Ragnotti Clio Gr N
                                                              The SADEV Left Drive Flange (7711129608 / F1903157) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the driveshaft. A crucial link in the kinematic chain of your Renault Clio 2 Group N . A...
                                                              €806.15Price
                                                              En Stock
                                                              €16.66 Price
                                                              En Stock
                                                              €16.66 Price
                                                              Soufflet de Cardan Coté BV Phase 2 Clio Gr N
                                                                  Soufflet de Cardan Coté BV Phase 2 Clio Gr N Référence: 7711129525
                                                                  €16.66Price
                                                                  Soufflet de Cardan Coté BV Phase 2 Clio Gr N
                                                                      Soufflet de Cardan Coté BV Phase 2 Clio Gr N Référence: 7711129525
                                                                      €16.66Price
                                                                      En Stock
                                                                      €16.52 Price
                                                                      En Stock
                                                                      €16.52 Price
                                                                      Collier soufflet sur tulipe diam 93.5 Clio Gr N
                                                                          Collier soufflet sur tulipe diam 93.5 Clio Gr N Référence: 77 11 156 805
                                                                          €16.52Price
                                                                          Collier soufflet sur tulipe diam 93.5 Clio Gr N
                                                                              Collier soufflet sur tulipe diam 93.5 Clio Gr N Référence: 77 11 156 805
                                                                              €16.52Price
                                                                              Couronne 52 dents ( 11 / 52 ) équipée Clio Gr NSADEV 52-Tooth Crown Wheel for Renault Clio 2 Gr.N (11/52 Ratio)
                                                                                  Don't let poor gear ratios ruin your stage times. This official 52-tooth crown wheel , manufactured by SADEV for Renault Sport , is the key component for your 11/52 final drive . Specifically designed for the Renault Clio 2 Gr.N equipped with the ST66 gearbox , it...
                                                                                  €565.21Price
                                                                                  Couronne 52 dents ( 11 / 52 ) équipée Clio Gr NSADEV 52-Tooth Crown Wheel for Renault Clio 2 Gr.N (11/52 Ratio)
                                                                                      Don't let poor gear ratios ruin your stage times. This official 52-tooth crown wheel , manufactured by SADEV for Renault Sport , is the key component for your 11/52 final drive . Specifically designed for the Renault Clio 2 Gr.N equipped with the ST66 gearbox , it...
                                                                                      €565.21Price
                                                                                      En Stock
                                                                                      €1,746.37 Price
                                                                                      En Stock
                                                                                      €1,746.37 Price
                                                                                      Couple 12X57 court - grosses cannelures Twingo R2
                                                                                          Couple 12X57 court - grosses cannelures Twingo R2 Référence: 7711167609
                                                                                          €1,746.37Price
                                                                                          Couple 12X57 court - grosses cannelures Twingo R2
                                                                                              Couple 12X57 court - grosses cannelures Twingo R2 Référence: 7711167609
                                                                                              €1,746.37Price
                                                                                              En Stock
                                                                                              €1,075.99 Price
                                                                                              En Stock
                                                                                              €1,075.99 Price
                                                                                              Arbre secondaire 11 dents (pour couronne 52 dts) Clio Gr NSADEV 11-Tooth Secondary Shaft - Renault Clio 2 Gr.N ST66
                                                                                                  Do not let a fragile transmission compromise your rally performance. This 11-tooth secondary shaft , specifically designed to mate with a 52-tooth crown wheel , is an official Renault Sport competition part manufactured by SADEV . Destined for the ST66 gearbox of the Renault Clio 2 Group N ,...
                                                                                                  €1,075.99Price
                                                                                                  Arbre secondaire 11 dents (pour couronne 52 dts) Clio Gr NSADEV 11-Tooth Secondary Shaft - Renault Clio 2 Gr.N ST66
                                                                                                      Do not let a fragile transmission compromise your rally performance. This 11-tooth secondary shaft , specifically designed to mate with a 52-tooth crown wheel , is an official Renault Sport competition part manufactured by SADEV . Destined for the ST66 gearbox of the Renault Clio 2 Group N ,...
                                                                                                      €1,075.99Price
                                                                                                      Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N
                                                                                                          Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N 7711129473
                                                                                                          €1,017.37Price
                                                                                                          Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N
                                                                                                              Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N 7711129473
                                                                                                              €1,017.37Price
                                                                                                              En Stock
                                                                                                              €695.47 Price
                                                                                                              En Stock
                                                                                                              €695.47 Price
                                                                                                              Arbre (barreau) nu transmission gauche Twingo R2Arbre (barreau) nu transmission gauche Twingo R2
                                                                                                                  Arbre (barreau) nu transmission gauche Twingo R2 Référence: 7711167603
                                                                                                                  €695.47Price
                                                                                                                  Arbre (barreau) nu transmission gauche Twingo R2Arbre (barreau) nu transmission gauche Twingo R2
                                                                                                                      Arbre (barreau) nu transmission gauche Twingo R2 Référence: 7711167603
                                                                                                                      €695.47Price
                                                                                                                      SADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 GearboxSADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 Gearbox
                                                                                                                          The SADEV 12-Tooth Secondary Shaft (7711129468 / F19030201) is a core component of your SADEV ST66 gearbox. This original SADEV part ensures the vital connection to the differential via the 58-tooth crown wheel for the specific 12x58 final drive . The replacement of a damaged...
                                                                                                                          €988.36Price
                                                                                                                          SADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 GearboxSADEV 12-Tooth Secondary Shaft (7711129468) - Renault Clio 2 Gr N ST66 Gearbox
                                                                                                                              The SADEV 12-Tooth Secondary Shaft (7711129468 / F19030201) is a core component of your SADEV ST66 gearbox. This original SADEV part ensures the vital connection to the differential via the 58-tooth crown wheel for the specific 12x58 final drive . The replacement of a damaged...
                                                                                                                              €988.36Price
                                                                                                                              En Stock
                                                                                                                              €1,901.64 Price
                                                                                                                              En Stock
                                                                                                                              €1,901.64 Price
                                                                                                                              Transmission gauche assemblée Clio R3 MaxiRenault Sport Left Drive Shaft for Clio R3 Max
                                                                                                                                  Do not let a mechanical failure compromise your next rally. This assembled left-hand drive shaft is an official Renault Sport component (reference 7711168126 ), specifically developed for the Renault Clio R3 Max . Engineered to withstand the extreme constraints of a competition-grade F4R engine, this left CV...
                                                                                                                                  €1,901.64Price
                                                                                                                                  Transmission gauche assemblée Clio R3 MaxiRenault Sport Left Drive Shaft for Clio R3 Max
                                                                                                                                      Do not let a mechanical failure compromise your next rally. This assembled left-hand drive shaft is an official Renault Sport component (reference 7711168126 ), specifically developed for the Renault Clio R3 Max . Engineered to withstand the extreme constraints of a competition-grade F4R engine, this left CV...
                                                                                                                                      €1,901.64Price
                                                                                                                                      Bol de Roue Clio 2 Cup et Williams Gr A
                                                                                                                                          The SADEV Wheel Housing (Hub Carrier) (references 7700108002 , 7711155366 , 1008025 ) is an essential part for ensuring the fastening and reliability of the driveshaft at the wheel end on your competition vehicle . It is used notably on the Renault Clio 2 X65 Cup equipped with the SADEV...
                                                                                                                                          €130.96Price
                                                                                                                                          Bol de Roue Clio 2 Cup et Williams Gr A
                                                                                                                                              The SADEV Wheel Housing (Hub Carrier) (references 7700108002 , 7711155366 , 1008025 ) is an essential part for ensuring the fastening and reliability of the driveshaft at the wheel end on your competition vehicle . It is used notably on the Renault Clio 2 X65 Cup equipped with the SADEV...
                                                                                                                                              €130.96Price
                                                                                                                                              En Stock
                                                                                                                                              €1,594.54 Price
                                                                                                                                              En Stock
                                                                                                                                              €1,594.54 Price
                                                                                                                                              Transmission droite assemblée Clio R3 MaxiRenault Sport Right Drive Shaft for Clio R3 Max
                                                                                                                                                  Maintain the traction and balance of your front axle with this complete right-hand drive shaft , an original Renault Sport component (reference 7711168127 ). Specifically calibrated for the high-stress environment of the Renault Clio R3 Max , this CV axle ensures absolute reliability during full-throttle gear changes. Do not...
                                                                                                                                                  €1,594.54Price
                                                                                                                                                  Transmission droite assemblée Clio R3 MaxiRenault Sport Right Drive Shaft for Clio R3 Max
                                                                                                                                                      Maintain the traction and balance of your front axle with this complete right-hand drive shaft , an original Renault Sport component (reference 7711168127 ). Specifically calibrated for the high-stress environment of the Renault Clio R3 Max , this CV axle ensures absolute reliability during full-throttle gear changes. Do not...
                                                                                                                                                      €1,594.54Price
                                                                                                                                                      Collection soufflet de transmission gauche coté boite Clio 3 RS - Megane 2 RS
                                                                                                                                                          Collection soufflet de transmission gauche coté boite Clio 3 RS et Megane 2 RS Véritable produit d'origine
                                                                                                                                                          €108.19Price
                                                                                                                                                          Collection soufflet de transmission gauche coté boite Clio 3 RS - Megane 2 RS
                                                                                                                                                              Collection soufflet de transmission gauche coté boite Clio 3 RS et Megane 2 RS Véritable produit d'origine
                                                                                                                                                              €108.19Price
                                                                                                                                                              Left-hand inner CV boot repair kit (gearbox side) for Renault Megane 3 RS and Megane N4 rally cars.
                                                                                                                                                                  Do not risk a catastrophic transmission fluid leak, sudden failure of your left-hand inner CV joint tripod, or the highly expensive replacement of a complete genuine Renault Sport driveshaft assembly. The Kit soufflet de transmission cardan gauche coté boite Megane 3 RS et...
                                                                                                                                                                  €85.96Price
                                                                                                                                                                  Left-hand inner CV boot repair kit (gearbox side) for Renault Megane 3 RS and Megane N4 rally cars.
                                                                                                                                                                      Do not risk a catastrophic transmission fluid leak, sudden failure of your left-hand inner CV joint tripod, or the highly expensive replacement of a complete genuine Renault Sport driveshaft assembly. The Kit soufflet de transmission cardan gauche coté boite Megane 3 RS et...
                                                                                                                                                                      €85.96Price
                                                                                                                                                                      En Stock
                                                                                                                                                                      €65.56 Price
                                                                                                                                                                      En Stock
                                                                                                                                                                      €65.56 Price
                                                                                                                                                                      Collection soufflet Megane 3 RS coté roueCollection soufflet Megane 3 RS coté roue
                                                                                                                                                                          Collection soufflet Megane 3 RS coté roue Véritable produit d'origine
                                                                                                                                                                          €65.56Price
                                                                                                                                                                          Collection soufflet Megane 3 RS coté roueCollection soufflet Megane 3 RS coté roue
                                                                                                                                                                              Collection soufflet Megane 3 RS coté roue Véritable produit d'origine
                                                                                                                                                                              €65.56Price
                                                                                                                                                                              En Stock
                                                                                                                                                                              €248.51 Price
                                                                                                                                                                              En Stock
                                                                                                                                                                              €248.51 Price
                                                                                                                                                                              Genuine Renault Sport Clio 3 X85 Cup front race wheel bowl part 7711160118 F1908361.
                                                                                                                                                                                  Do not risk imprecise steering, severe track vibrations, or drivetrain failure on your running gear. The genuine wheel bowl for Renault Clio 3 X85 Cup (OEM references 7711160118 and F1908361 ) is the fundamental link component of the...
                                                                                                                                                                                  €248.51Price
                                                                                                                                                                                  Genuine Renault Sport Clio 3 X85 Cup front race wheel bowl part 7711160118 F1908361.
                                                                                                                                                                                      Do not risk imprecise steering, severe track vibrations, or drivetrain failure on your running gear. The genuine wheel bowl for Renault Clio 3 X85 Cup (OEM references 7711160118 and F1908361 ) is the fundamental link component of the...
                                                                                                                                                                                      €248.51Price
                                                                                                                                                                                      Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 2 et 3
                                                                                                                                                                                          Collection de soufflet de cardan gauche coté boite Clio 2 RS
                                                                                                                                                                                          €86.59Price
                                                                                                                                                                                          Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 2 et 3
                                                                                                                                                                                              Collection de soufflet de cardan gauche coté boite Clio 2 RS
                                                                                                                                                                                              €86.59Price