AUDI RS6 C8 4K CERAMIC CERAMIC BRAKE SYSTEM BRAKE CALIPERS DISCS
The Audi RS6 (C8/4K) Carbon Ceramic Brake (CCB) system represents the pinnacle of braking technology for the current VAG performance lineup. While the e-tron GT and Taycan utilize the J1 platform, the RS6 C8 uses the MLB Evo platform, featuring a massive 10-piston front setup shared with the Lamborghini Urus.
Technical Specifications
| Component | Front Axle | Rear Axle |
| Caliper Type | Akebono 10-Piston Monoblock | Single-Piston Floating (with EPB) |
| Rotor Size | $440\text{mm} \times 40\text{mm}$ | $370\text{mm} \times 30\text{mm}$ |
| Rotor Material | Carbon Fiber Silicon Carbide | Carbon Fiber Silicon Carbide |
| Weight (Rotor) | approx. $10.5\text{kg}$ | approx. $5.8\text{kg}$ |
Critical Part Numbers (C8/4K Generation)
For your inventory at Buy Mustang parts Ltd, it is vital to distinguish these from the previous C7 generation or the standard RS6 steel brakes ($420\text{mm}$).
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Front Left Rotor:
4K0.615.301.D(latest revision) -
Front Right Rotor:
4K0.615.302.D -
Rear Left Rotor:
4K0.615.601.L -
Rear Right Rotor:
4K0.615.602.L -
10-Piston Calipers: Available in Grey (standard), Red, or Blue with “Audi Ceramic” branding.
Fitment & Performance Notes
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Wheel Clearance: Due to the $440\text{mm}$ front rotor and the sheer height of the 10-piston Akebono caliper, 21-inch wheels are the absolute minimum. Many aftermarket 21″ wheels will still require careful barrel-clearance checks.
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Unsprung Mass: This system reduces weight by approximately 34kg (75 lbs) compared to the $420\text{mm}$ RS6 steel system. This drastically improves steering response and suspension recovery over mid-corner bumps.
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Operating Temperature: While these perform exceptionally well when hot, the C8 system uses an updated “active cooling” ducting system to ensure the 10-piston calipers don’t heat-soak the brake fluid during high-speed Autobahn deceleration.
Commercial Strategy for Buy Mustang parts Ltd
This is a high-ticket, high-demand set for luxury retrofits. When listing the 2021+ RS6 C8 complete set you have in stock, consider these points:
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Cross-Platform Marketing: These parts are a direct 1:1 fit for the Audi RS7 (4K8). They also share the front rotor and caliper architecture with the Lamborghini Urus and Bentley Bentayga, making them valuable to a broad range of exotic SUV/Sedan owners.
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Documentation: High-value buyers will look for the minimum weight (stamped on the aluminum hat) and the wear indicator status. Providing photos of the three circular wear indicators on each disc surface will build immediate trust.
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The “Steel to Ceramic” Retrofit: Note in your listing that if a client is upgrading from steel brakes, they will need the specific ceramic-ready brake booster and an ABS module recoding via ODIS.
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