2019-2025 Audi A6 / S6 / RS6 (C8) 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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2019-2025 Audi A6 / S6 / RS6 (C8) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
This StopFlex kit is for C8 Audi A6, S6, and RS6 owners who want the heat stability, lower brake dust, and reduced rotating mass of carbon-ceramic brakes without treating every C8 trim as the same car. The front axle uses a Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper over a 380mm carbon-ceramic rotor, while the rear uses a TTSPORT EP4 4-Piston Caliper with EPB and a 380mm rotor to keep rear thermal capacity and parking-brake function in the same package. Brackets, rotor-hat offsets, caliper placement, lines, pads, hats, and hardware are specified after the customer’s exact A6, S6, or RS6 trim and wheel package are confirmed.
- 380mm carbon-ceramic rotors front and rear require 19-inch or larger wheels; wheel spoke clearance is still checked because the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper has real radial and lateral clearance needs.
- The front upgrade uses the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, a credible OEM-derived Audi RS brake component matched here to StopFlex carbon-ceramic rotors, pads, hats, lines, and hardware.
- C8 A6, S6, and RS6 trims can differ in upright, hub, brake mount, and wheel-offset conditions, so this kit is engineered per confirmed trim rather than sold as a platform-wide bolt-on assumption.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A6 / S6 / RS6 (C8) |
| Model years | 2019-2025 |
| 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 is built around the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, giving the C8 chassis a six-piston fixed-caliper layout for more even pad loading and a firmer, more repeatable pedal under heat than a smaller sliding-caliper setup. Because this is an OEM-derived Audi RS Akebono caliper, the buyer gets a proven production-performance caliper architecture rather than an anonymous aftermarket casting. StopFlex matches its caliper position, rotor-hat offset, pads, lines, and hardware to the customer’s exact A6, S6, or RS6 configuration.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB, adding real rear service-brake piston area while retaining electronic parking-brake function. Its four hydraulic service pistons support rear-axle thermal capacity and braking stability so the 380mm front upgrade is not paired with an underbuilt rear setup.
Front & rear, engineered together: StopFlex engineers the 380mm front and 380mm rear package as a matched system so front clamping force, rear contribution, rotor thermal capacity, and parking-brake hardware work together instead of stacking a front-only upgrade onto the factory rear brakes. The EP4 rear architecture uses four hydraulic service pistons plus a dedicated EPB actuator piston, preserving OE-style EPB convenience while supporting the brake balance expected on a heavy C8 Audi sedan or wagon.
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 2019-2025 Audi A6, S6, and RS6 C8 the same way?
No. StopFlex does not assume platform-wide fitment across the C8 family because A6, S6, and RS6 trims can differ in front knuckles, hub geometry, brake mounting, and wheel clearance. The brackets, rotor-hat offsets, caliper mounting, lines, and hardware are specified for the customer’s exact trim before the kit is built.
What wheel size do I need for the 380mm carbon-ceramic rotors?
The largest rotor in this kit is 380mm, so wheels under 19 inches will not clear it. A 19-inch or larger wheel is the starting point, but StopFlex still checks spoke profile, wheel offset, and caliper face clearance for the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper and the EP4 rear caliper.
Will the electronic parking brake still work?
Yes. The rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, which combines four hydraulic braking pistons with a dedicated EPB actuator piston so the C8 Audi keeps electronic parking-brake function while gaining a 380mm rear carbon-ceramic brake package.
Why choose this carbon-ceramic kit instead of staying with OEM iron brakes?
Carbon-ceramic rotors reduce brake dust, cut rotating and unsprung mass compared with like-sized iron rotors, and handle repeated heat cycles with more stable pedal feel when properly matched to pad compound and caliper sizing. On a C8 A6, S6, or RS6 running open wheels or repeated high-speed braking, the 380mm front and rear StopFlex package targets heat capacity, cleaner wheels, and lower mass without deleting EPB functionality.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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