2013-2020 Audi A3 / S3 / RS3 (8V) 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.
2013-2020 Audi A3 / S3 / RS3 (8V) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The 2013-2020 Audi A3 / S3 / RS3 8V owner shopping this kit is usually trying to solve heat fade, heavy iron-rotor dust, or repeated rotor replacement after faster street and track use. This StopFlex kit pairs a 400mm front carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper, then matches the rear axle with a TTSPORT EP4 4-Piston Caliper with EPB and 380mm carbon-ceramic rotor. The result is higher thermal capacity, lower brake dust, reduced rotating mass versus comparable iron hardware, and trim-specific fitment engineering instead of a generic 8V-platform assumption.
- 400mm front rotors require 20-inch or larger wheels on the Audi A3 / S3 / RS3 8V; wheels under 20 inches will not clear, and spoke clearance must still be confirmed.
- Front braking is built around the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper, not an unbranded universal caliper.
- The rear package uses a TTSPORT EP4 4-Piston Caliper with EPB and 380mm rotor so the 8V keeps electronic parking-brake function while adding rear thermal capacity.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A3 / S3 / RS3 (8V) |
| Model years | 2013-2020 |
| 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 Audi RS caliper selected for high clamp stability and consistent pedal response on the 400mm rotor. Its credibility comes from genuine Audi RS application lineage rather than a generic aftermarket casting. StopFlex matches the caliper mounting, bracket, and hat offset to the customer’s exact A3, S3, or RS3 8V trim before the kit is built.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB to add hydraulic rear braking capacity while preserving electronic parking-brake operation. Its four hydraulic service pistons support rear-axle stability under braking, while the dedicated EPB actuator keeps the factory parking-brake function in the system.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 400mm Akebono front setup and 380mm EP4 rear setup work as a matched package rather than a front-only conversion that leaves rear heat capacity and bias unmanaged. The TTSPORT EP4 shares EP4S engineering with four hydraulic service pistons plus a dedicated EPB actuator piston, so rear braking capacity and OE parking-brake convenience are addressed together.
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. |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
TTSPORT EP4S rear caliper specification (the EP4 shares the same engineering, slightly more compact):
| Specification | EP4S |
|---|---|
| Axle position | Rear |
| Piston count | 4 hydraulic + 1 EPB actuator |
| Piston type | Two-piece heat-insulated, dust boots + EPB actuator |
| Piston diameter | 28 mm × 4 / 27 mm × 1 |
| Total piston area | 30.4 cm² per caliper |
| Manufacturing process | Two-piece forged aluminum body |
| Net weight | 4.50 kg per caliper (no pads) |
| Surface finish | High-temperature gloss coating |
| Recommended wheel size | 18 in or larger |
FAQ
Will this kit fit my exact Audi A3, S3, or RS3 8V?
Fitment is confirmed by exact trim before production. StopFlex does not treat every 8V as the same car; brackets, rotor-hat offsets, and caliper mounting are matched to the confirmed A3, S3, or RS3 configuration.
What wheel size do I need for the 400mm front rotor?
This kit requires 20-inch or larger wheels because the front rotor is 400mm. Wheels below 20 inches will not clear, and StopFlex still checks spoke clearance because caliper face clearance depends on wheel design and offset.
Will the electronic parking brake still work?
Yes. The rear setup uses the TTSPORT EP4 4-Piston Caliper with EPB, which includes hydraulic service pistons for braking and a dedicated EPB actuator so the factory electronic parking-brake function is retained.
Why choose carbon-ceramic rotors on an Audi 8V instead of another iron big-brake kit?
Carbon-ceramic rotors reduce brake dust, cut rotating and unsprung mass versus comparable iron hardware, and provide better heat control for repeated high-speed stops. On an A3, S3, or RS3 8V with open wheels and aggressive use, those gains address dust, fade, and rotor service life at the same time.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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