2009-2016 Audi RS4 / S4 (B8) Carbon Ceramic Brake 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 Kit — OEM-Size Replacement
B8 S4 and RS4 owners usually reach this page when the factory-size iron brakes are adding dust, vibration, and heat load, or when an RS4 carbon-ceramic rotor needs replacement without buying a dealer rotor set. This StopFlex OEM-replacement kit keeps the car on its correct brake envelope: S4 345 mm front / 330 mm rear, RS4 365 mm front / 330 mm rear, or RS4 380 mm front carbon-ceramic configuration. Carbon-ceramic discs, matched pads, hats, and floating hardware reduce rotating mass and keep repeat-stop behavior more stable than an iron rotor of the same diameter.
- S4 B8 fitment is built around the factory 345 mm front and 330 mm rear rotor sizes, not an oversized front big-brake conversion.
- RS4 B8 applications are limited to the listed 365 mm front iron-size replacement or 380 mm front carbon-ceramic replacement, with 330 mm rear rotors.
- Floating hats and hardware allow the carbon-ceramic friction ring to grow under heat, which helps manage vibration and pedal inconsistency during fast road or track-session use.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi RS4 / S4 (B8) |
| Model years | 2009-2016 |
| Front rotor reference | RS4: 365mm, 380mm (CCB); S4: 345mm |
| Rear rotor reference | RS4: 330mm; S4: 330mm |
| Page type | OEM-size carbon ceramic replacement |
| Minimum wheel size | 19" (for the 365 mm rotor) |
For OEM replacement orders, StopFlex builds around the factory rotor specification shown for this vehicle. Front floating-caliper setups require manual review before production. If the car uses aftermarket calipers such as Brembo, AP Racing, Alcon, or Wilwood, the order can still be built, but the exact caliper model, pad shape, and rotor dimensions must be confirmed before production.
This setup uses a 365 mm rotor, so the minimum wheel size is 19". Wheels under 19" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
Why StopFlex CCB
Lower Unsprung Mass
StopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.
High-Temperature Stability
The carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.
Rust-Free Rotor Surface
Carbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.
Long Street-Service Potential
In normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.
Low Visible Dust
When paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.
Premium Ceramic-Glaze Appearance
StopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.
Street-Usable Cold Bite
Street Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.
Continuous Fiber Reinforcement
Long-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.
Custom Rotor Hat Color
Every StopFlex OEM replacement order can be built with a custom rotor hat color, giving the carbon ceramic rotor package a cleaner match with the wheel, body color, and overall build style.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak into pads, fluid, seals, calipers, wheels, and nearby components. For long track sessions, mountain descents, or sustained aggressive driving, brake cooling and high-temperature fluid are still recommended.
Street / Track-Day / Motorsport Rotor Options
Street Spec
Ceramic coating, cross-drilled face, and large cooling channels.
Best for daily driving and premium street builds that need clean cold bite, low dust, corrosion-free appearance, and long service life.
Track-Day Spec
Ceramic coating, blank face, and honeycomb cooling channels.
Best for fast-road and track-day use where repeated braking stability matters more than maximum visual drilling style.
Motorsport Spec
Uncoated blank face with honeycomb cooling channels.
Best for race-focused builds that run competition pads, high-temperature fluid, cooling strategy, and a proper warm-up window. Not the default street choice.
Package Scope
| Item | Details |
|---|---|
| CCB rotors | Full-car set by default |
| CCB brake pads | Matched for StopFlex carbon ceramic rotors |
| 7075 aluminum floating rotor hats | Vehicle-specific fitment |
| Stainless floating hardware | Full-car hardware set |
| Rotor hat color | Custom rotor hat colors are available for every OEM replacement order. |
| Order scope | Default listing is full-car set. Front-only or rear-only orders can be arranged after confirmation. |
FAQ
Will this kit fit every 2009-2016 B8 S4 or RS4?
No. This page is limited to the exact B8 S4 and RS4 trims and rotor sizes listed here: S4 345 mm front / 330 mm rear, RS4 365 mm front / 330 mm rear, and RS4 380 mm front carbon-ceramic / 330 mm rear. Confirm your current rotor diameter before ordering.
Do I keep the factory electronic parking brake?
Yes, the kit replaces rotors, pads, hats, and floating hardware while retaining the compatible factory rear caliper layout. On B8 cars equipped with the rear electronic parking brake, the EPB function is preserved when the kit is matched to the correct 330 mm rear setup.
Why switch from the factory iron brakes on a B8 S4?
The 345 mm S4 front iron rotor can build heat quickly on repeated downhill or track braking, and iron pads leave visible dust on open wheels. A carbon-ceramic replacement reduces rotating mass, lowers brake dust, and gives the same OEM-size fitment target instead of changing calipers.
What should I confirm before buying for an RS4?
Confirm whether your RS4 uses the 365 mm front setup or the 380 mm front carbon-ceramic setup, then check wheel clearance against that brake package. The rear reference for this page is 330 mm, so a mismatch in front rotor diameter is the main ordering risk.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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