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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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Optimise the sealing and performance of your Renault Megane 3 RS with our genuine Renault right-hand drive shaft seal!
This high-quality universal joint is designed to ensure a perfect connection between the right-hand drive shaft and the gearbox, preventing oil leaks and internal damage.
€18.47Price
Butée embrayage renforcée Helix Clio 16S et Williams
€36.00Price
Joint Spy d'origine permettant l'etanchéité entre la boite et le cardan coté gauche
€23.35Price
Disque d'embrayage Helix organique amorti Clio 16S et Williams
€194.78Price
An Original RENAULT part , this quickshift control rod boot is essential for the longevity and precision of your gear selection system. It protects the rod joints against water, dust, and contaminants.
A manufacturer quality component indispensable for maintaining the **sharp gear change feel**...
€6.71Price
Vis Fixation Volant Moteur pour Megane 2 RS et Megane 3 RS
Vendue à l'unité
€6.89Price
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
Conduite hydraulique embrayage coté recepteur Twingo RS R1 et R2
Véritable produit d'origine
€63.55Price
Genuine Renault Gearbox/Engine Fixing Stud (78mm) - Clio 2 RS, Clio 2 Gr N, Clio 3 RS
Authentic Renault fixing stud, 78mm length.
Ensures a solid and precise connection between the gearbox and the engine.
Specifically designed for Renault Clio 2 RS, Clio 2 Gr N, and Clio 3 RS models.
You can also find the...
€4.91Price
Tuyau hydraulique embrayage coté recepteur Twingo RS R1 et R2
Véritable produit d'origine
€46.86Price
Gearbox Reverse Gear Unlock Cable Renault Sport Clio 3 X85 Cup SADEV ST75 (Ref: 7711160360)
Ensure the reliable operation of the reverse gear mechanism of your Renault Clio 3 X85 Cup equipped with the SADEV ST75 sequential gearbox with this genuine Renault Sport reverse gear unlock cable (Ref: 7711160360 ). A...
€195.66Price
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 risk a catastrophic mechanical failure of your gearbox, severe whining noises during gear changes, or an input shaft misalignment that will prematurely destroy your brand-new clutch kit. The premium Roulement de guidage d'arbre primaire pour Renault Sport (Clio 2 RS, Clio 3...
€12.84Price
Ensure your transmission reliability with this genuine Renault Sport NTN cup . A key component of your drive shaft assembly, it is specifically designed for the Renault Clio 2 Cup (X65) , Clio 2 Group N , Clio 3 Cup (X85) , and Clio R3 . This official component guarantees perfect...
€7.32Price
Tuyau entrée butée (nouveau diamètre)
€45.26Price
Protect your competition transmission with this left-hand gearbox side CV boot for the Clio R3 (reference 7711160753 ). This specific Renault Sport component is essential for maintaining the seal of your gearbox and ensuring optimal...
€25.91Price
Magnetic Drain Plug 16x1.5 (7711156704)
Protect your engine with this genuine Renault Sport magnetic drain plug. Its 16x1.5 thread pitch is compatible with many models. It captures metal particles for cleaner oil and better engine longevity. Essential for optimal maintenance.
€34.57Price
Don't let a simple failure compromise the driving precision of your Clio 2 RS . This right-hand driveshaft oil seal (joint spi) is a genuine RENAULT original part , guaranteeing renewed **reliability and performance**. Essential for the sealing of your gearbox, it maintains the oil level and protects your...
€26.29Price
Never underestimate the importance of small parts! This SADEV reverse gear shift fork circlip (P/N: 0601002 ) is an essential safety component for your ST66 dog-ring gearbox in the Renault Clio 2 Gr N . It ensures the precise retention of the reverse gear shift fork , preventing any misalignment or jamming....
€1.44Price
Do not risk missed gear shifts, erratic ignition cut-offs, or costly dog-ring damage on your sequential transmission. The genuine SADEV STDSA gear position sensor (OEM reference F0089033 ) is the precision electronic sensor required to accurately detect...
€289.28Price
Arrêt de gaine commande vitesses Megane 3 RS et N4
Véritable produit d'origine
€107.80Price
ELF Tranself NFX SAE 75W Gearbox Oil – 1 Litre
The ELF Tranself NFX SAE 75W gearbox oil is a synthetic transmission lubricant designed for manual gearboxes requiring...
€18.79Price
Joint etancheité capot de 5eme Clio RS et Gr N
€7.51Price
Rondelle mince de calage ép. 0,50 - pour rlt 6205 - 6304
€21.80Price
Joint de bouchon de remplissage d'huile boite
€8.03Price
En Stock
€3.36
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En Stock
€3.36
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Secure essential components of your Twingo R2 or Clio 3 X85 Cup with the original Renault CHC M10-55 screw. Don't risk incorrect installation or dangerous loosening. Discover other necessary fasteners for perfect assembly.
€3.36Price
Durably protect your gearshift mechanism with this genuine Renault gearbox linkage boot . Designed to seal the junction between the gear selector rod and the connection link (or quickshift ), it prevents dust and moisture from entering. This OEM component is essential for owners of the Clio 2...
€15.30Price
Ensure your shift reliability with the SADEV double pawl spring (references 0801026 and 0100801026 ). This genuine part is a critical component for the proper functioning of the locking mechanism on your ST75-14 sequential gearbox . Designed for the Renault Clio 2 X65 Cup , Clio 3 X85 Cup , and...
€7.24Price
Cale de butée embrayage série Twingo R2
Référence: 7711162840
€55.32Price
Do not risk a loose clutch pedal sticking to the floorboard during quick shifts, a total locking out of gear changes at high RPM, or an asymmetrical clamping pressure that will destroy your manual JC5 gearbox. The premium heavy-duty Fourchette d'embrayage et butée d'embrayage Clio 2...
€94.62Price