Audi RS4 / S4 (B8) Carbon Ceramic Brakes Kit
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
2009-2016 Audi RS4 / S4 (B8) Carbon Ceramic Brake Kits
The B8 RS4/S4 Avant mixes real family-car weight and cargo duty with genuinely fast road pace, so buyers usually want stronger repeat-stop confidence without giving up daily refinement. On this platform, the main upgrade questions are front size choice, wheel/caliper clearance, and whether the car will see mountain-road or track heat.
- Body style: Avant
- Front rotor reference: RS4: 365mm, 380mm (CCB); S4: 345mm
- Rear rotor reference: RS4: 330mm; S4: 330mm
This is an OEM-size replacement kit. The rotors are built to the factory rotor spec and install with the factory caliper when the front caliper is a fixed design and the rotor spec matches. The included pad shape matches the OEM pad shape. If the car uses aftermarket calipers such as Brembo, AP Racing, Alcon, or Wilwood, provide the exact caliper model and StopFlex can supply the matching pad shape. Direct replacement is not confirmed if the front caliper is floating, or if the car already runs a non-OEM-offset rotor and the actual rotor dimensions cannot be supplied.
Why StopFlex CCB
Lightweight
Half the Weight, Sharper Handling. StopFlex carbon-ceramic rotors shed roughly half the mass of equivalent iron discs. This massive drop in unsprung weight instantly transforms your chassis, delivering sharper turn-in response and a significantly more refined road feel.
High-Temp Resistance
Minimal Brake Fade at 900°C (1652°F). While traditional iron rotors severely fade under heavy track loads, our CCB matrix holds a stable 0.30μ friction coefficient even at 900°C (1652°F). You get consistent, predictable stopping power when things get dangerously hot.
Corrosion Resistance
100% Rust-Free Durability. Say goodbye to flash rust after a car wash or heavy rain. The carbon-silicon carbide material is naturally impervious to corrosion, ensuring your brake rotors look completely clean and pristine no matter the weather conditions.
Long Lifespan
250,000+ km (155,000+ mi) Lifespan. Iron rotors typically require replacement around 100,000 km (62,000 mi). In normal street driving conditions, a StopFlex CCB rotor can easily last 250,000 to 300,000 km (155,000 to 186,000 mi), effectively outlasting the vehicle itself.
Ultra-Low Dust
Ultra-Low Visible Brake Dust. Heavy black dust destroying your wheel finish is a thing of the past. When paired with our matched StopFlex pads, these rotors generate virtually zero visible brake dust, keeping your premium wheels spotless for much longer.
Premium Visual Finish
Premium Mirror-Like Finish. StopFlex utilizes a patented ceramic formula that cures with a distinct crackle pattern. The surface is machined dead-smooth for high reflectivity, providing a premium aesthetic behind open wheels under the right lighting.
High Normal-Temp Friction
Strong Initial Bite (0.40μ+). With matched StopFlex pads, normal-temperature friction can exceed 0.40μ for a firmer pedal feel and strong initial bite.
Long-Fiber Construction
Continuous Long-Fiber Strength. StopFlex utilizes a continuous long-fiber 3D matrix. This structure is significantly stronger and offers higher thermal conductivity than standard chopped-fiber OEM CCM discs.
Cold First-Stop Confidence
Reliable Cold-Bite at -20°C (-4°F). Coated street rotors still deliver normal first-stop braking at -20°C (-4°F). Uncoated motorsport rotors are the exception.
Important heat note
Carbon ceramic does not shed heat as fast as steel. Long hard driving can heat-soak the rest of the brake system, including fluid, seals, and nearby parts. Unless the car already has strong brake cooling, or you plan to upgrade brake cooling, prolonged aggressive driving is not recommended.
Rotor options
Street Spec
Ceramic coating + cross-drilled face + large cooling channels.
Street: 365 mm front is the cleaner choice for fast-road RS4-style use where you want strong braking with fewer fitment headaches.
Track-Day Spec
Ceramic coating + blank face + honeycomb cooling channels.
Trackday: 380 mm front makes the most sense for heavier repeated stops, aggressive road driving, or S4 owners building toward RS4-level brake capacity.
Motorsport Spec
No coating + blank face + honeycomb cooling channels. Not for normal street use.
Motorsport: 380 mm with proper wheel clearance and supporting cooling is the better pick for sustained hard lapping.
Pads
| Item | Details |
|---|---|
| Pad shape | The included StopFlex pad shape matches the OEM pad shape used by the retained caliper. |
| Aftermarket calipers | Provide the exact caliper model and StopFlex can supply the matching pad shape. |
| Pad details | For compound details and pad-specific parameters, see the StopFlex Ceramic Brake Pad for CCB Rotor product page. |
What’s included
| Item | Included |
|---|---|
| CCB rotors | Full-car set |
| CCB brake pads | Full-car set |
| 7075 aluminum floating rotor hats | Full-car set |
| Stainless floating hardware | Full-car set |
| Order scope | Default listing includes front set + rear set. Front-only or rear-only can be ordered separately. |
FAQ
Will a StopFlex carbon ceramic brake kit for the Audi RS4 / S4 Avant (B8) work with my factory calipers, or do I need specific calipers?
For this B8 Avant platform, fitment depends on the exact caliper and rotor pairing, not just the chassis name. If you are keeping factory hardware, confirm the kit is built around your RS4 or S4 mounting pattern and wheel-clearance envelope before ordering.
Which StopFlex carbon ceramic size should I choose for my Audi RS4 / S4 Avant (B8): 345, 365, or 380 mm?
Use the size that matches the role of the car and your starting point. S4 owners typically step up beyond 345 mm for a real change, while RS4 owners usually choose 365 mm for easier packaging or 380 mm for the highest heat capacity.
Is a StopFlex carbon ceramic brake kit on the Audi RS4 / S4 Avant (B8) suitable for daily street use and cold first stops?
Yes, if your priority is a road-driven Avant with cleaner wheels and strong everyday braking, a street-focused setup can suit this chassis well. If you are very sensitive to cold first-stop feel, ask for the most street-biased friction package rather than choosing only by maximum size.
Do I need extra cooling with a StopFlex carbon ceramic brake kit on the Audi RS4 / S4 Avant (B8) for repeated hard use?
For fast road use, the kit alone may be enough, but prolonged hard sessions are where this platform starts to reward better airflow. If your B8 Avant sees track laps or long mountain descents, pair the larger front setup with proper ducting and fluid discipline.
Need fitment confirmation?
Send the exact vehicle details and current brake setup before ordering.
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