Owners of the Audi RS6 and RS7 (C8 platform) often seek to upgrade from factory steel rotors to a Carbon Ceramic Brake (CCB) system to reduce unsprung weight and improve thermal management. Choosing the correct brake pads is the most critical step in this conversion, as using standard steel-rotor pads will destroy the ceramic discs almost instantly. This guide examines the specific pad requirements and compatibility standards for C8-generation conversions.
Contents
- Key Context
- Structured Analysis
- Practical Checklist
- CTA
- FAQ
- Source Notes
- Professional Disclaimer
Key Context
The Audi RS6 and RS7 C8 come from the factory with either a massive steel brake system or an optional factory Carbon Ceramic Brake package. Conversion kits for vehicles originally equipped with steel brakes typically aim to replicate or exceed the factory CCB specifications, which utilize 420mm front rotors and 370mm rear rotors. Because the friction interface of a carbon-silicon carbide disc differs fundamentally from cast iron, the brake pads must be specifically engineered with a softer, more compatible compound to avoid abrasive wear on the rotor surface.
Structured Analysis
1. Friction Material Requirements
Brake pads for the Audi RS6/RS7 C8 CCB conversion must be "CCB-specific." Unlike steel pads, which rely on a sacrificial layer of friction material and abrasive friction, ceramic pads utilize adherent friction. This process involves the transfer of a thin layer of pad material onto the rotor surface. Using a pad designed for steel rotors on a ceramic disc will cause "milling," where the harder steel-spec pad eats into the ceramic structure, leading to premature and extremely expensive rotor failure.
2. Physical Fitment and Plate Design
While the caliper in a conversion kit often dictates the pad shape, most high-quality C8 conversion kits utilize 1:1 plug-and-play geometry. This means the pads must match the specific radial depth of the 420mm front and 370mm rear rotors. For the Audi C8 platform, the front calipers are typically 10-piston units. The pads must feature the correct backing plate dimensions to sit flush within these calipers without overhang, which could cause uneven heat distribution.
3. Recommended Manufacturers
Data from conversion kit providers indicates that Pagid and TMD Friction are the primary manufacturers for these specialized pads. These brands produce dedicated compounds, such as the Pagid RSC series, which are formulated specifically for ceramic-to-pad interfaces. These pads are often included within high-end conversion kits to ensure the user does not accidentally install a generic performance pad intended for iron discs.
4. Sensor and Electronic Integration
The Audi RS6/RS7 C8 utilizes electronic pad wear sensors. When converting to CCBs, it is essential to use pads that have the necessary cut-outs or clips for these sensors. Furthermore, the vehicle's ECU or ABS/ESC module may require coding changes if the overall braking torque profile changes significantly, though many physical conversion kits are designed to work within the parameters of the factory master cylinder and software.
Practical Checklist
- Verify Rotor Type: Confirm your rotors are Carbon-Silicon Carbide (C/SiC) before selecting pads.
- Confirm Rotor Size: Ensure the pads are matched to 420mm front and 370mm rear diameters to prevent "swept area" issues.
- Material Match: Only select pads explicitly labeled for "Carbon Ceramic" or "Ceramic Discs" (e.g., Pagid RSC1).
- Hardware Check: Verify if the conversion kit requires new anti-rattle clips or specialized shims for the C8 10-piston calipers.
- Wear Sensors: Purchase new wear sensors compatible with the RS6/RS7 C8 harness, as the old sensors from steel pads are often brittle and break during removal.
- Bed-In Procedure: Follow the specific thermal bed-in process required for CCBs, which differs significantly from the process used for steel brakes.
Recommended Next Step
Looking to plan the right brake package for Audi RS6? Browse our Audi Collection to compare vehicle-specific carbon ceramic rotor and upgrade options.
FAQ
Can I use the same pads if I switch back to steel rotors?
No. Pads that have been used on carbon ceramic rotors should not be used on steel rotors, and vice versa. Cross-contamination of the friction material can lead to unpredictable braking performance and noise.
How do I know if a pad is compatible with my C8 conversion?
Check the manufacturer part number against the specific caliper used in your kit. Most RS6/RS7 C8 kits use the 10-piston front caliper design, which requires a specific "multi-pad" or large-format single pad setup depending on the kit brand.
Do CCB conversion pads squeal more than steel pads?
Generally, carbon ceramic pads can be noisier when cold. However, when paired with the correct 420mm/370mm rotors and properly bedded in, the noise on the Audi C8 platform is usually minimal during standard street driving.
Are there different pads for track use on the RS6 C8?
Yes, some manufacturers offer higher-friction "sprint" or "endurance" ceramic pads. However, these may increase rotor wear rates and are generally not recommended for daily driven RS6 or RS7 models due to increased dust and noise.
Explore fitment-focused options here: Audi Collection.
Source Notes
- Source: https://www.mtm-usa.com/products/carbo-brake-steel-to-carbon-ceramic-brake-conversion-for-c8-rs6rs7
- Source: https://www.tritonmotorsportsusa.com/post/the-ultimate-brake-upgrade-guide-floating-steel-rotors-and-carbon-ceramic-conversions-for-high-perf
Professional Disclaimer
All third-party trademarks, brand names, and model names are the property of their respective owners. References are for identification only and do not imply affiliation or endorsement. High-performance braking modifications should only be performed by qualified professionals to ensure vehicle safety and compliance with local regulations.