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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.

Active filters

  • Categories: Clutches and flywheels
  • Categories: Drive Shafts
Clutch Pressure Plate Mechanism | Renault Clio 3 RS, X85 Cup
      Do not risk transmission slippage during hard acceleration, premature wear of your friction disc, or a catastrophic mechanical failure during aggressive gear changes on track. The premium uprated clutch pressure plate mechanism for the Renault Clio 3 RS and X85 Cup delivers...
      €228.74Price
      Clutch Pressure Plate Mechanism | Renault Clio 3 RS, X85 Cup
          Do not risk transmission slippage during hard acceleration, premature wear of your friction disc, or a catastrophic mechanical failure during aggressive gear changes on track. The premium uprated clutch pressure plate mechanism for the Renault Clio 3 RS and X85 Cup delivers...
          €228.74Price
          Thermoplastic outer CV joint boot kit with clamps and grease for Renault Clio 2 RS track cars.
              Do not risk a massive grease spray over your high-performance front brake discs, sudden failure of your outer CV joint, or a forced retirement during a competitive rally stage. The premium Kit soufflet graisse et collier coté bol Clio 2 Gr N is the high-strength driveline...
              €107.52Price
              Thermoplastic outer CV joint boot kit with clamps and grease for Renault Clio 2 RS track cars.
                  Do not risk a massive grease spray over your high-performance front brake discs, sudden failure of your outer CV joint, or a forced retirement during a competitive rally stage. The premium Kit soufflet graisse et collier coté bol Clio 2 Gr N is the high-strength driveline...
                  €107.52Price
                  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
                          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
                                  En Stock
                                  €518.09 Price
                                  En Stock
                                  €518.09 Price
                                  Arbre (barreau) nu transmission droit Twingo R2Arbre (barreau) nu transmission droit Twingo R2
                                      Arbre (barreau) nu transmission droit Twingo R2 Référence: 7711167604
                                      €518.09Price
                                      Arbre (barreau) nu transmission droit Twingo R2Arbre (barreau) nu transmission droit Twingo R2
                                          Arbre (barreau) nu transmission droit Twingo R2 Référence: 7711167604
                                          €518.09Price
                                          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
                                                  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
                                                          €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
                                                                  New Right Driveshaft - Renault Clio 2 RS Phase 2 and Phase 3New Right Driveshaft - Renault Clio 2 RS Phase 2 and Phase 3
                                                                      Replace your worn or damaged right driveshaft with this high-quality new right driveshaft , specifically designed for the Renault Clio 2 RS Phase 2 and Phase 3 . Ensure smooth and reliable power transmission for optimal performance.
                                                                      €194.95Price
                                                                      New Right Driveshaft - Renault Clio 2 RS Phase 2 and Phase 3New Right Driveshaft - Renault Clio 2 RS Phase 2 and Phase 3
                                                                          Replace your worn or damaged right driveshaft with this high-quality new right driveshaft , specifically designed for the Renault Clio 2 RS Phase 2 and Phase 3 . Ensure smooth and reliable power transmission for optimal performance.
                                                                          €194.95Price
                                                                          En Stock
                                                                          €399.53 Price
                                                                          En Stock
                                                                          €399.53 Price
                                                                          Bol de roue ass et modifié Twingo R2Genuine RENAULT Sport Wheel Hub Cup - Twingo R2
                                                                              Do not take any risks with the transmission of your Twingo R2 ! Get the Genuine RENAULT Sport Wheel Hub Cup (Tripod Joint Housing), the splined end of the driveshaft that seats into the wheel hub. A critical part for the traction of your sports car . New part sourced from the official catalogue for flawless...
                                                                              €399.53Price
                                                                              Bol de roue ass et modifié Twingo R2Genuine RENAULT Sport Wheel Hub Cup - Twingo R2
                                                                                  Do not take any risks with the transmission of your Twingo R2 ! Get the Genuine RENAULT Sport Wheel Hub Cup (Tripod Joint Housing), the splined end of the driveshaft that seats into the wheel hub. A critical part for the traction of your sports car . New part sourced from the official catalogue for flawless...
                                                                                  €399.53Price
                                                                                  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
                                                                                          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
                                                                                              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
                                                                                                      €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
                                                                                                              €102.54 Price
                                                                                                              En Stock
                                                                                                              €102.54 Price
                                                                                                              Kit soufflet de palier de Cardan Clio 2 RS
                                                                                                                  Kit soufflet de palier de Cardan Clio 2 RS Attention, plusieurs modeles existent, merci de verifier la compatibilité avec votre cardan
                                                                                                                  €102.54Price
                                                                                                                  Kit soufflet de palier de Cardan Clio 2 RS
                                                                                                                      Kit soufflet de palier de Cardan Clio 2 RS Attention, plusieurs modeles existent, merci de verifier la compatibilité avec votre cardan
                                                                                                                      €102.54Price
                                                                                                                      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
                                                                                                                              €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
                                                                                                                                      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
                                                                                                                                              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
                                                                                                                                                      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
                                                                                                                                                              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