2009-2016 Audi A4 / S4 / RS4 (B8) CCB Big Brake Kit | Akebono 8N 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2009-2016 Audi A4 / S4 / RS4 (B8) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
Audi B8 A4, S4, and RS4 owners usually look at carbon-ceramic brakes when repeated heat cycles, heavy iron-rotor dust, or front-end weight become the limiting factor in fast street and track use. This StopFlex kit pairs a 380mm front carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, then matches the rear with a 380mm carbon-ceramic rotor and TTSPORT EP4 4-Piston Caliper with EPB. Each kit is built around the customer's exact A4, S4, or RS4 trim so the brackets, hat offsets, caliper position, lines, and wheel clearance are confirmed before production.
- 380mm front and rear carbon-ceramic rotors require 19-inch or larger wheels; spoke clearance must still be checked against the Akebono front caliper and EP4 rear caliper profile.
- The front axle uses the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, giving the B8 chassis a larger multi-piston pressure spread than the standard A4/S4 sliding-caliper layout.
- The rear axle keeps electronic parking-brake functionality with the TTSPORT EP4 4-Piston Caliper with EPB, so the kit adds rear thermal capacity without deleting the factory EPB system.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A4 / S4 / RS4 (B8) |
| Model years | 2009-2016 |
| Front setup | Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper / 380mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 19" (for the 380 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 380 mm front 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.
| 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 upgrade uses the exact Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, a six-piston fixed caliper selected to spread pad pressure across the 380mm carbon-ceramic rotor for stable clamping and firmer pedal response under repeated braking. Its value is OEM provenance: this is a genuine Audi RS-derived Akebono caliper, not an unbranded universal casting. StopFlex engineers the caliper brackets, rotor-hat offset, and line routing to the customer's confirmed B8 A4, S4, or RS4 trim rather than assuming all B8 uprights and wheel packages are the same.
Rear Caliper (Balance)
The rear uses the TTSPORT EP4 4-Piston Caliper with EPB, adding four hydraulic service pistons to support rear brake stability and heat capacity while retaining electronic parking-brake function. The EP4 engineering uses the same piston concept as the EP4S family, including a dedicated EPB actuator piston, so the B8 keeps OE parking-brake convenience with a rear big-brake layout.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 380mm Akebono front package and 380mm EP4 EPB rear package are matched for rotor diameter, hydraulic behavior, thermal capacity, and vehicle-specific mounting geometry. Buying the axles together avoids a front-only mismatch where the front rotor and caliper capacity increase while the rear axle remains heat-limited and visually undersized behind 19-inch wheels.
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 (8N) Caliper |
| Front CCB rotors | 380mm |
| 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 380mm kit fit my exact B8 A4, S4, or RS4?
Fitment is confirmed per vehicle, not assumed from the B8 chassis code. StopFlex matches the brackets, rotor-hat offsets, caliper mounting, brake lines, and hardware to the customer's exact trim, drivetrain, hub/upright package, and wheel data before the kit is built.
What wheels are required for the 380mm carbon-ceramic rotors?
The 380mm front and rear rotors require 19-inch or larger wheels. Diameter alone is not enough; spoke clearance must also be checked against the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper in front and the TTSPORT EP4 rear caliper.
Will the electronic parking brake still work?
Yes, this rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, which includes hydraulic service pistons for braking and a dedicated EPB actuator piston for parking-brake operation. The kit is intended to retain the B8's factory electronic parking-brake convenience rather than deleting it.
Why choose carbon-ceramic instead of another iron big-brake kit for this Audi?
Carbon-ceramic rotors reduce rotating and unsprung mass compared with similarly sized iron rotors, produce far less visible brake dust, and tolerate repeated high-temperature use without the same heat-soak behavior. On a B8 A4, S4, or RS4 running open 19-inch wheels or track-day braking loads, those gains address weight, dust, and fade at the same time.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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