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⚙️ Transmission Category – Strengthen the traction and reliability of your drivetrain
High-performance engine tuning requires a transmission that's up to par. At STR Performance , we offer a complete selection of high-performance transmission parts designed to handle more torque, improve traction, reduce power loss, and accelerate more efficiently.
Whether it's for a track car, a drift car, a prepared daily driver or a powerful front-wheel drive car, it is essential to optimize the transmission to ensure reliability and exploit the potential of your engine. Our components are designed for intensive use and are compatible with the most efficient vehicles on the market: Golf GTI / R, Clio RS, Civic Type R, BMW M, Audi S / RS, Focus ST / RS, Supra, GR Yaris, etc.
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🔧 Subcategories of transmission in detail:
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🛞 Reinforced clutches & performance clutch kits
A reinforced clutch is essential as soon as the engine torque exceeds the original values. It offers better grip, better torque transfer and increased heat resistance.
Our kits generally include:
• Organic, cerametallic or paddle discs
• Reinforced mechanisms
• Hydraulic or mechanical stops
• Compatibility with original or lightweight flywheel
SEO keywords: reinforced car clutch, performance clutch kit, ceramic clutch, stage 1 2 3 clutch
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🌀 Lightweight flywheels
Lightweight flywheels reduce engine inertia, improving throttle response, revving, and pedal feel. Perfect for naturally aspirated or turbocharged engines, whether for everyday driving or track use.
Ideal as a complement to a sports clutch to reduce rotating masses.
SEO keywords: lightweight flywheel, lightweight racing flywheel, fast engine response, engine weight reduction
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🔩 Limited Slip Differentials (LSD)
A limited slip differential (or LSD) is essential for optimizing traction when exiting corners, limiting wheel spin, and improving efficiency on the track, drifting, or racing. Available in:
• Turntable (2-way or 1.5-way)
• Torsen
• Viscous coupling
• Preloaded discs
Each system improves dynamic behavior depending on the type of driving.
SEO Keywords: limited slip differential, car LSD, sport limited slip differential, Torsen performance
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🔧 Reinforced universal joints and drive shafts
Our reinforced driveshafts are designed to handle high power, especially on front-wheel drive (FWD), rear-wheel drive (RWD), or all-wheel drive (AWD). Stock driveshafts are often the weak link in a tuned car, especially with a turbo or high torque.
SEO keywords: reinforced car drive shaft, high-performance transmission, sports drive shaft, performance drive shafts
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🔁 Short shift & gear lever kits
A short shifter reduces shift travel for faster, firmer, and more precise shifting. Perfect for dynamic driving and track use.
Our kits can include:
• Complete short shifter
• Aluminum levers
• Selection rods
• Reinforced ball joints
SEO keywords: short shifter car, short shift kit, sports gearbox control, racing gear lever
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🛡️ Reinforced gearbox mounts & silentblocs
Transmission mounts absorb vibrations and secure the powertrain to the chassis. Reinforced versions (polyurethane or rigid) improve gear shifting precision, engine responsiveness, and limit unwanted movement.
SEO keywords: reinforced gearbox mount, transmission silentbloc, rigid engine mount, polyurethane mounting
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⚙️ Short ratios, pinions and gearbox reinforcements
We also offer modified gearbox ratios, reinforced gears, reinforced synchro kits, or gearbox reinforcement kits for extreme configurations or cars regularly running on track.
Ideal for shortening gears, saving time on acceleration and strengthening the gearbox when faced with high power.
SEO keywords: short gear ratios, reinforced gears, sports synchros, gearbox reliability
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🚗 Vehicle compatibility
Our performance transmission parts are available for many sports cars:
Volkswagen Golf GTI / R, Audi A3/S3/RS3, BMW M, Clio RS, Mégane RS, 208 GTI, Focus RS/ST, Civic Type R, Supra, Yaris GR, 350Z, 370Z, and more.
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✅ Why STR Performance for your transmission?
• 🔧 Products tested and validated on road & circuit
• 🔥 Designed to withstand high power
• ⚙️ Suitable for manual and automatic transmissions depending on configuration
• 🛠️ Personalized technical advice for your project
• 🚚 Fast delivery, stock in France
Product return
Product return within 14 days with conditions*
Tracked Delivery
Track your order in real time with Colissimo, UPS FEDEX TNT Chronopost DPD GEODIS
HOTLINE online
Our experts are at your disposal by email or telephone
100% secure payment
Bank card payments via CIC Monetico, COFIDIS or PAYPAL in 4 installments free of charge
FAQ: The Most Frequently Asked Questions
How do I track my package?
As soon as the shipment is made, you will receive an email with a tracking link. You can also find this link in your customer account, under "My Orders." Delivery is tracked via Chronopost, Colissimo, DPD, or UPS.
How to contact Customer Service?
You can contact our customer service by email at https://strperformance.com/en/ or by phone at +33 01 34 67 70. We are available Monday to Friday, from 9:00 a.m. to 12:00 p.m. and from 2:00 p.m. to 5:00 p.m. Customer service is closed between 12:00 p.m. and 2:00 p.m. Response guaranteed within 24 to 48 hours (excluding weekends and public holidays).
Which countries do you deliver to?
STR Performance ships your orders all over the world: mainland France, French overseas departments and territories, Europe (Belgium, Switzerland, Spain, Germany, etc.) as well as internationally (Canada, Maghreb, overseas, etc.).
Our shipping partners include Chronopost, Colissimo, DPD and UPS, depending on the country, weight and size of the package.
Shipping costs are automatically calculated at the checkout stage based on your address. Each shipment is tracked online and secure.
We deliver to your home, collection point or business depending on the options available in your area.
What are the shipping times?
Shipping times at STR Performance depend on product availability and delivery destination.
✅ Products in stock : dispatch within 24 to 48 working hours after payment validation (excluding weekends and public holidays).
🔄 Products being restocked or personalized : an additional delay may apply (specified on the product sheet or communicated by our customer service).
Average delivery times after dispatch :
🇫🇷 Metropolitan France : 1 to 3 working days via Chronopost, Colissimo or DPD
🇪🇺 Europe (Belgium, Luxembourg, Germany, Spain, etc.) : 3 to 7 working days
🌍 DOM-TOM, Canada, Maghreb, and rest of the world : 5 to 12 working days depending on the area
Each order benefits from online tracking : you will receive an email with a tracking number as soon as your package is picked up by the carrier.
Important : Orders placed after 12 p.m. are generally processed the following business day. Delivery times may be longer during busy periods (sales, promotions, holidays, etc.).
How much are the shipping costs?
Shipping costs are calculated automatically at the checkout stage, based on the weight, volume of your package and your delivery area.
We offer several carriers (Chronopost, Colissimo, DPD, UPS) with rates adapted for France, Europe, the French overseas departments and territories and internationally.
The exact cost is displayed before payment, once your address has been entered.