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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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The Renault Sport clutch master cylinder , reference 7711160250 , is a component of the hydraulic clutch system designed for the Renault Clio 3 RS , including Clio R3 and X85 Cup versions.
The clutch master cylinder converts the force applied to the clutch pedal into hydraulic pressure, allowing the clutch release system...
€114.83Price
The Clio R3 transmission retaining ring (ref. 7711160756 ) is a performance part from the RENAULT SPORT catalog, essential for securing the transmission of your Renault Clio R3 Max and Renault Clio R3 Access . It ensures reliable and precise retention, crucial for competition. We ship worldwide.
€5.23Price
Do not compromise the axial adjustment of your SADEV ST66 gearbox ! This countershaft shim (Ref. F1903028 ) is an essential SADEV brand part to ensure mounting...
€26.60Price
Conduite hydraulique embrayage coté recepteur Twingo RS R1 et R2
Véritable produit d'origine
€63.55Price
Tuyau hydraulique embrayage coté recepteur Twingo RS R1 et R2
Véritable produit d'origine
€46.86Price
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
Do not let an approximate transmission compromise your stage times. This 56-tooth crown wheel for 11-tooth shafts is an official Renault Sport component, engineered by SADEV specifically for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor of SADEV parts for the Renault...
€820.75Price
The SADEV Left Side Output Flange (references F1908350 / 7711160348 ) is the gearbox output element that ensures the essential connection between the differential and the driveshaft (Lobro type) of your left-hand transmission. A vital part of the SADEV ST75 sequential gearbox , it is homologated for the...
€583.44Price
Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N Référence: 7711129543
€1,004.35Price
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
Couple 12X53 - petites canelures Twingo R2
Référence: 7711162863
€1,767.94Price
Soufflet de cardan droit coté palier Clio 3 RS
€84.01Price
Transmission D - Ragnotti Clio Gr N Référence: 7711129606
€1,418.04Price
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
Collier soufflet sur tulipe diam 93.5 Clio Gr N
Référence: 77 11 156 805
€16.52Price
Do not risk a mechanical failure and retirement during your next stage. This 56-tooth crown wheel for 12-tooth shafts is an official Renault Sport competition part, engineered by the experts at SADEV for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor ...
€758.77Price
Couronne 63 dents ( 12 / 63 ) équipée Clio Gr N Référence: F19030231
€898.58Price
Anneau d'arret transmission circlips Twingo R2 Référence: 7711167345
€1.75Price
Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N 7711129473
€1,017.37Price
Do not risk an oil leak or a complete transmission failure due to neglected hardware. This M8x20 CHC bolt (Grade 10.9, raw finish) is an official Renault Sport component, manufactured by SADEV . Specifically designed for securing the differential cover on the ST66 gearbox of the Renault Clio 2...
€0.79Price
Collier Serrage Inox D80 Twingo R2 Référence: 7711167624
€3.28Price
Transmission (cardan) G Twingo RS et R1 Référence: 7711167335
€258.36Price
Transmission (cardan) D Twingo RS et R1 Référence: 7711167336
€358.98Price
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
Couple 12X57 court - grosses cannelures Twingo R2 Référence: 7711167609
€1,746.37Price
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
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
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
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
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
Arbre (barreau) nu transmission gauche Twingo R2 Référence: 7711167603
€695.47Price
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