2003-2013 Audi A3 / S3 / RS3 (8P) CCB Big Brake Kit | Akebono 9N 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2003-2013 Audi A3 / S3 / RS3 (8P) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
This StopFlex kit is for Audi A3, S3, and RS3 8P owners who have outgrown the factory iron brake package through heat fade, rotor mass, brake dust, or repeated high-speed braking. The front axle uses a 400mm carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper, while the rear uses a 380mm carbon-ceramic rotor with the TTSPORT EP4 4-Piston Caliper with EPB for a matched front/rear conversion. Each order is engineered to the confirmed trim, because 8P A3, S3, and RS3 variants can differ in knuckle, hub, and wheel-clearance requirements.
- 400mm is the largest rotor in this 8P kit, so 20-inch wheels are the minimum; wheels under 20 inches will not clear the front brake package, and spoke clearance still has to be checked.
- The front upgrade pairs a Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper with a 400mm StopFlex carbon-ceramic rotor to increase thermal capacity and reduce iron-rotor dust on open-wheel A3/S3/RS3 builds.
- The rear package uses a 380mm carbon-ceramic rotor with a TTSPORT EP4 4-Piston Caliper with EPB, so rear brake torque and heat capacity are addressed instead of leaving the car as a front-only big-brake mismatch.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A3 / S3 / RS3 (8P) |
| Model years | 2003-2013 |
| Front setup | Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper / 400mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 20" (for the 400 mm front rotor) |
Every StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.
This setup uses a 400 mm front rotor, so the minimum wheel size is 20". Wheels under 20" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
| Wheel Size (Standard) | Disc Range |
|---|---|
| 15" | 260 mm – 285 mm |
| 16" | 285 mm – 300 mm |
| 17" | 300 mm – 330 mm |
| 18" | 330 mm – 355 mm |
| 19" | 355 mm – 380 mm |
| 20" | 380 mm – 400 mm |
| 21" | 400 mm – 420 mm |
| 22" | 420 mm – 440 mm |
Caliper Overview — Front & Rear Balance
Front Caliper (Primary Upgrade)
The front axle uses the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper, a six-piston OEM-derived performance caliper selected for stable pad loading across the 400mm rotor face. Its multi-piston layout improves clamp distribution and pedal consistency compared with smaller sliding-caliper arrangements. Because this is a genuine OEM Audi RS-based Akebono unit, the kit is built around a proven production caliper architecture rather than an unbranded conversion caliper.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB on a 380mm carbon-ceramic rotor to add rear-axle thermal capacity and keep the brake balance from becoming overly front-biased. The EP4 design uses four hydraulic service pistons plus a dedicated EPB actuator piston, but factory 8P parking-brake configuration must be confirmed because the 8P chassis is commonly equipped with a manual cable handbrake rather than factory EPB.
Front & rear, engineered together: StopFlex engineers the 400mm Akebono front and 380mm TTSPORT EP4 rear hardware as one system so rotor diameter, hat offset, bracket geometry, hydraulic behavior, and wheel clearance are matched to the exact A3, S3, or RS3 8P trim. This avoids the common front-only upgrade problem where the front axle gains heat capacity while the rear axle remains thermally and visually undersized.
Make It Yours — Color & Logo Customization
Every StopFlex kit-upgrade order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the brake package matches your exact build instead of a fixed off-the-shelf look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
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.
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 |
|---|---|
| Front calipers | Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper |
| Front CCB rotors | 400mm |
| Rear calipers | TTSPORT EP4 4-Piston Caliper with EPB |
| Rear CCB rotors | 380mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| Color customization | Custom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order. |
| Order scope | Default listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation. |
FAQ
Will this 400mm kit fit my exact Audi A3, S3, or RS3 8P?
Fitment is confirmed per car, not assumed from the 8P chassis name. StopFlex verifies your exact trim, hub and knuckle package, wheel diameter, wheel offset, and spoke clearance before machining brackets and rotor hats.
What wheel size is required for the 400mm front rotor?
The 400mm front rotor requires 20-inch wheels minimum. Wheels under 20 inches will not clear the rotor and caliper package, and even 20-inch wheels still need spoke-clearance verification for the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper.
Will the electronic parking brake still work?
This rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, but the 8P A3/S3/RS3 is generally a manual cable-handbrake chassis from the factory. StopFlex will confirm the car’s rear parking-brake system before finalizing the rear configuration.
Why choose carbon-ceramic rotors on an 8P instead of a larger iron big-brake kit?
Carbon-ceramic rotors reduce brake dust, resist high-temperature fade, and cut rotating mass compared with large iron rotors. On an 8P using a 400mm front and 380mm rear package, the benefit is most noticeable during repeated high-speed stops, track sessions, and open-wheel street builds where dust and rotor weight matter.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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