2010-2018 Audi A8 / S8 (D4) 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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2010-2018 Audi A8 / S8 (D4) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The D4 Audi A8 and S8 put real load into their brakes because of the chassis weight, quattro traction, and repeated high-speed stops; owners usually shop this kit to reduce iron-rotor heat fade, brake dust, and heavy rotor mass. This StopFlex upgrade uses 380mm carbon-ceramic rotors with a Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper in front and a TTSPORT EP4 4-Piston Caliper with EPB in the rear, so heat capacity, pedal control, and rear parking-brake function are addressed together. Each kit is built for the confirmed A8 or S8 D4 trim, with trim-specific brackets and rotor-hat offsets instead of a platform-wide fitment assumption.
- 380mm carbon-ceramic rotors are used front and rear; 19-inch wheels are the minimum wheel diameter, and spoke clearance must still be verified before production.
- Front braking is handled by the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, an OEM-derived 6-piston fixed caliper selected for repeatable clamp distribution on the 380mm rotor.
- The D4 A8/S8 rear axle keeps electronic parking-brake functionality through the TTSPORT EP4 4-Piston Caliper with EPB instead of deleting the factory parking-brake feature.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A8 / S8 (D4) |
| Model years | 2010-2018 |
| 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 axle uses the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, a 6-piston fixed caliper that spreads clamping load across the pad for firmer pedal response and more even use of the 380mm rotor face. Its credibility comes from its OEM Audi RS/Akebono provenance rather than an unknown aftermarket casting, making it a strong match for an A8 or S8 owner who wants factory-grade caliper engineering in a carbon-ceramic big-brake package. StopFlex matches the front caliper brackets and hat offsets to the customer's confirmed D4 trim before the kit is built.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB, adding real rear service-piston braking capacity while retaining the electronic parking brake required on the A8/S8 D4. Its rear contribution is brake-bias support and stability under hard deceleration, not just visual symmetry behind the wheel.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 6-piston Akebono front calipers, EP4 rear calipers, 380mm rotors, pads, hats, lines, and hardware work from one brake-balance plan. The EP4 architecture uses 4 hydraulic service pistons plus a dedicated EPB actuator piston, preserving OE parking-brake convenience while giving the rear axle more thermal capacity than a front-only conversion can provide.
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 kit fit every 2010-2018 Audi A8 and S8 D4?
No platform-wide fitment is assumed. StopFlex builds the brackets, rotor-hat offsets, and caliper mounting around the customer's exact A8 or S8 D4 trim because standard A8, long-wheelbase A8, and S8 variants can differ in brake packaging, hub geometry, and wheel clearance.
What wheels do I need for the 380mm carbon-ceramic rotors?
The 380mm rotor package requires 19-inch or larger wheels. Diameter alone is not enough; the Akebono front caliper and EP4 rear caliper also require spoke-clearance confirmation using the customer's wheel size, offset, and inner barrel profile.
Will the electronic parking brake still work?
Yes, this kit uses the TTSPORT EP4 4-Piston Caliper with EPB at the rear, which is designed for modern platforms that require an electronic parking brake. The rear caliper uses hydraulic service pistons for braking and a dedicated EPB actuator piston to preserve factory parking-brake operation.
Why choose carbon-ceramic on an A8 or S8 D4 instead of replacing iron rotors?
Carbon-ceramic rotors reduce rotating and unsprung mass compared with large iron rotors, cut brake dust on open wheels, and resist heat buildup during repeated high-speed braking. On a heavy D4 luxury sedan, those gains matter most when the car is driven fast, used on mountain roads, or maintained beyond normal commuter duty.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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