Tetra Disc Clutch Kit Ø140mm for AUDI R8 LMS GT3
Kit Includes:
- 140mm / 5.5" 4-Plate Clutch Kit (3.89 Kg), equivalent to Audi Motorsport 3-Plate clutch kit PN: 42A141011B
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140mm Flywheel (2.65 Kg), equivalent to Audi Motorsport PN: 42A105273A
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1 piece Ring Gear plate (1.38kg), equivalent to Audi Motorsport PN: 00 3074 000 208 – 42A 105 221 A
- Clutch disc alignment tool (25 teeth x Ø28mm)
Why Choose Our Ø140mm (5½") Four-Plate Clutch Kit?
✅Our Ø140mm Four-Plate Clutch Kit is essential for hill climb and rally racing, offering twice the lifespan of the Audi Sport GmbH triple-disc clutch kit (ZF Sachs Racing).
✅ Proven in High-Torque Applications – Successfully used in Audi R8 LMS GT3 Ultra hill climb setups producing over 550 Nm of torque, as well as in Porsche 996, 997, 991, and 992 GT3 Cup hill climb and rally builds (with their respective specific clutch disc splines).
✅Engineered for Maximum Durability – Designed to withstand over 800Nm, ensuring exceptional reliability under extreme conditions.
✅Optimized Performance & Control – With our precisely tuned diaphragm and component tolerances, along with our specially developed sintered friction blend, we enhance driver control and pedal feel, allowing for smoother, quicker, and more precise launches. This results in improved start-line performance in hill climb races and rallies, ensuring faster engagement with reduced effort.
✅Ultra-Lightweight Design – The entire clutch kit weighs only 3.89 kg (excluding bolts)
Clutch Kit – Component Features
4-Plate Ø140mm Clutch Cover
✅Material: Forged 6061-T6 aluminum with Electroless Nickel Plating (ENP) coating for:
- Exceptional surface hardness (up to 650 HV)
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Superior wear and corrosion resistance to oils, fuels, and high temperatures, ensuring long-lasting protection and a clean metallic finish over time
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Excellent heat transfer and dimensional stability
✅Clutch cover legs are equipped with metal rivets to improve durability and guarantee smooth floater operation.
✅ Chromium-vanadium alloy steel diaphragm, with a special heat treatment, offers superior strength, elasticity, heat resistance, and excellent wear resistance.
Top/Pressure and Floater Plates
✅Material: Forged chromoly steel, ensuring maximum performance and longevity.
✅Cryogenic treatment for increased strength and durability under high loads and temperatures.
Clutch Discs
✅Sintered friction material with our proprietary blend of sintered metal compounds.
✅Optimized for:
- Exceptional durability & heat resistance
- High torque capacity
✅25T x Ø28mm spline.
Flywheel + Ring-Gear Design & Key Improvements
Our flywheel retains the same dimensions and weight (2.65kg) as the Audi Sport / Sachs Racing flywheel (PN: 42A105273A) but features several significant upgrades:
✅ One-Piece design Ring Gear – Far more reliable than the Audi Sport / Sachs Racing two-piece bolt-on ring gear system.
✅ High-Strength Forged Chromoly Steel (CrMo) – Special nitriding heat treatment delivers a 60 HRC surface hardness (twice as hard as the OEM Audi Sport flywheel and Ring Gear).
✅ Superior Durability & Longevity – Increased resistance to wear, deformation, and heat-related fatigue.
