AUDI RSQ8 Q8 RS CERAMIC CERAMIC BRAKE SYSTEM BRAKES NEW
The Audi RSQ8 (4M8) Carbon Ceramic Brake system is the flagship braking setup for the VAG SUV platform, sharing its core architecture with the Lamborghini Urus and Bentley Bentayga. While it shares the “10-piston” front caliper design with the RS6/RS7 (C8), the RSQ8 uses a specific offset and cooling profile tailored for the heavier SUV chassis.
Technical Specifications (Ceramic System)
| Component | Front Axle | Rear Axle |
| Caliper Type | Akebono 10-Piston Monoblock | Single-Piston Floating (with EPB) |
| Rotor Size | $440\text{mm} \times 40\text{mm}$ | $370\text{mm} \times 30\text{mm}$ (Standard) / $410\text{mm}$ (High-Spec) |
| Material | Carbon Fiber Silicon Carbide | Carbon Fiber Silicon Carbide |
| Minimum Wheel | 22-inch (Recommended) | 22-inch |
Key Part Numbers & Identification
When sourcing or cataloging these for Buy Mustang parts Ltd, accuracy is critical as the RSQ8 has two incompatible systems (Steel vs. Ceramic).
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Front Right (RH) Ceramic Rotor: 4M8.615.302.C (Latest revision)
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Front Left (LH) Ceramic Rotor: 4M8.615.301.C
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10-Piston Calipers:
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Blue: 4M8.615.107 / 108
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Red: Typically carries the same base number with a specific color suffix (e.g., G/H or J/K revisions).
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Note on Steel Rotors: Be cautious of part number 4M8.615.301.D. While it is a $420\text{mm}$ rotor for the RSQ8, it is a steel disc and is significantly cheaper and heavier than the ceramic version.
Interchangeability & Sales Strategy
Since you handle luxury automotive parts, the RSQ8 ceramic system is a high-yield inventory item due to its cross-platform demand:
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The “Urus” Connection: The 4M8.615.301/302 rotors are a direct 1:1 match for the Lamborghini Urus (2018–2026). Lamborghini owners often pay a higher dealership markup, so listing these as “RSQ8 / Urus Compatible” can attract a wider high-end customer base.
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Caliper Colors: The 10-piston calipers for the RSQ8 were factory-produced in Grey, Red, and Blue.
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Performance Advantage: Replacing the standard steel setup with this full ceramic kit removes approximately 30kg to 35kg of unsprung weight from the vehicle, which is a major selling point for “RS Q8 Performance” owners looking for sharper handling.
Cataloging Checklist for New Inventory
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Verify Wear Indicators: For “New” stock, ensure the surface is pristine. If “New Take-off,” verify the three circular wear indicators on each face are untouched.
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Mounting Brackets: Ensure the radial mounting brackets are included with the calipers, as they differ between the RSQ8 and the RS6/7.
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Brake Pads: Always recommend the specific ceramic-only brake pads (low-metal/high-friction) to avoid damaging the rotors.
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