2010-2018 Audi A8 / S8 (D4) CCB Big Brake Kit | Akebono 10N 10-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2010-2018 Audi A8 / S8 (D4) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The D4 Audi A8 and S8 are heavy, fast luxury sedans, and repeated high-speed stops can expose the limits of factory iron rotors through heat, dust, and front-end mass. This StopFlex kit pairs a 420mm front carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper, then matches it to a 380mm rear carbon-ceramic package using the TTSPORT EP4 4-Piston Caliper with EPB. The result is higher thermal capacity, lower brake dust, reduced rotating mass versus comparable iron hardware, and a kit built around the customer's exact D4 trim rather than a generic A8/S8 platform assumption.
- 420mm front carbon-ceramic rotors require 21-inch or larger wheels on the Audi A8/S8 D4; spoke clearance must still be checked against the Genuine Akebono OEM Audi RS 10-Piston caliper body.
- The rear package uses a 380mm carbon-ceramic rotor with the TTSPORT EP4 4-Piston Caliper with EPB, preserving electronic parking-brake function while adding rear-axle thermal capacity.
- Each D4 A8, A8 L, or S8 order is engineered to the confirmed trim because brackets, rotor-hat offsets, upright geometry, hub position, and wheel ET clearance can differ inside the same chassis family.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A8 / S8 (D4) |
| Model years | 2010-2018 |
| Front setup | Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper / 420mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 21" (for the 420 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 420 mm front rotor, so the minimum wheel size is 21". Wheels under 21" 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 10-Piston (10N) Caliper, giving the 420mm rotor a wide, multi-piston clamping layout for controlled pad pressure and a firm pedal under repeated braking. Its OEM-derived Audi RS provenance gives the kit a credible production-performance foundation instead of an anonymous aftermarket casting. StopFlex packages this caliper with carbon-ceramic rotors, matched pads, hats, brackets, hardware, lines, and trim-specific mounting geometry for the confirmed D4 application.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB on a 380mm carbon-ceramic rotor, adding rear brake capacity without deleting the D4's factory electronic parking-brake function. Its four hydraulic service pistons support rear stability under hard braking while the dedicated EPB actuator preserves OE parking-brake convenience.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 420mm 10-piston front setup is not paired with an undersized rear axle. Matching the rear EP4 EPB caliper and 380mm rotor to the front package helps maintain brake bias, heat distribution, and stability on a long-wheelbase, high-speed D4 sedan.
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 10-Piston (10N) Caliper |
| Front CCB rotors | 420mm |
| 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 2010-2018 Audi A8 or S8 D4?
StopFlex does not treat every D4 as the same car. Before production, the exact A8, A8 L, or S8 trim is confirmed so the brackets, rotor-hat offsets, caliper mounting, line routing, and wheel-clearance targets are built for that vehicle.
What wheel size is required for the 420mm front rotor?
The 420mm front rotor requires 21-inch or larger wheels. Wheel diameter alone is not enough; the Genuine Akebono OEM Audi RS 10-Piston caliper also needs spoke clearance, so wheel model, width, offset, and inner-barrel profile must be checked.
Will the electronic parking brake still work?
Yes. The rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, which combines hydraulic service braking with a dedicated EPB actuator so the D4 retains factory electronic parking-brake operation.
Why choose this carbon-ceramic kit instead of replacing factory iron brakes?
For an A8/S8 D4 owner, the main reasons are heat capacity, lower dust, lower rotating mass than comparable iron hardware, and a larger matched front/rear package. The 420mm front carbon-ceramic rotor and 380mm EPB rear setup are aimed at repeated high-speed braking without giving up street parking-brake functionality.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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