The build: parts and fitment
| Parameter | STOPFLEX Specification |
|---|---|
| Vehicle | Audi RS6 Avant (C8) |
| Front rotors | STOPFLEX C/SiC carbon ceramic, 420 x 40 mm |
| Rear rotors | STOPFLEX C/SiC carbon ceramic, 370 x 30 mm |
| Calipers | Factory fixed 10-piston front calipers retained |
| Pads | STOPFLEX low-dust street compound for carbon ceramic |
| Wheel baseline | Factory 21-inch OEM wheels |
| Upgrade type | Direct-fit rotor and pad conversion, factory calipers kept |
Confirm before you order
This is a rotor-and-pad upgrade that relies on your RS6 C8 keeping its factory fixed multi-piston calipers. The 420 x 40 mm fronts are built around standard 21-inch OEM wheels, so if your car runs aftermarket wheels or a different spoke profile, check barrel and spoke clearance first.
What you actually get on the RS6 C8
| STOPFLEX feature | Why it matters on the RS6 C8 | What you notice |
|---|---|---|
| Carbon ceramic rotors, about half the weight of steel | The RS6 is heavy and fast, so big iron rotors pile mass onto the suspension and the spinning drivetrain. | Sharper turn-in and a more settled front end, plus less rotating weight to spin up and slow down. |
| Holds about 0.3μ surface friction at 900°C | Repeated high-speed stops cook iron rotors into heat soak, and that's where pedal confidence fades. | A bigger heat reserve before the brakes go soft on a long descent or a fast back road. |
| Low-dust pad pairing | Open-spoke 21-inch wheels show every bit of pad residue, and the RS6 wears them proudly. | Wheels that stay clean far longer between washes. |
| Long-fiber CCB construction | Daily-driven luxury performance cars need durability, not just one good track day. | Street life that can reach roughly 250,000 to 300,000 km without track abuse. |
| No rust after rain, normal cold bite | Iron rotors surface-rust after a wash and can feel wooden on the first cold stop. | Clean rotor faces year-round and normal braking even around -20°C on the first stop. |
What gets better
- Less unsprung and rotating mass for crisper steering and ride composure
- Stronger fade resistance when you stack hard stops back to back
- Very low brake dust with the matched STOPFLEX pads
- Rotors that don't rust after rain or washing
- Normal-temp friction over 0.4μ for confident, predictable pedal feel
What to confirm first
- Your RS6 is a C8 with the factory fixed multi-piston calipers
- Front 420 x 40 mm and rear 370 x 30 mm rotor sizes match your car
- Wheel clearance if you run anything other than the factory 21-inch wheels
- You're pairing the rotors with STOPFLEX carbon ceramic pads and bedding them in correctly
If you're not sure your car matches the spec shown here, send us your details and we'll confirm Audi RS6 C8 fitment before you order through our Audi CCB collection.
Build gallery
RS6 C8 carbon ceramic FAQ
Do I have to replace my factory RS6 C8 calipers for this upgrade?
No. This is a direct-fit rotor and pad upgrade built around the RS6 C8 factory fixed multi-piston calipers. You keep the original calipers and swap to STOPFLEX carbon ceramic rotors and matched pads.
Will carbon ceramic brakes feel harsh or noisy on a daily-driven RS6?
With STOPFLEX pads and proper bedding, the setup stays street-friendly. Cold braking works normally even around -20°C on the first stop, brake dust is very low, and pedal feel stays predictable rather than race-car grabby.
How long do STOPFLEX carbon ceramic rotors last on the street?
For normal road use without track abuse, STOPFLEX rotor life can reach about 250,000 to 300,000 km. Real-world life depends on driving style, pad choice, and maintenance.
Do these rotors clear the factory 21-inch RS6 wheels?
This application is built around the factory brake package and the standard 21-inch OEM wheels. If your car runs aftermarket wheels or a different spoke profile, confirm clearance before ordering.
What rotor sizes does this RS6 C8 kit use?
The package is built around 420 x 40 mm front rotors and 370 x 30 mm rear rotors in STOPFLEX C/SiC carbon ceramic, matched with a low-dust street pad compound.
