2017-2024 Audi A5 / S5 / RS5 (B9) 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.
2017-2024 Audi A5 / S5 / RS5 (B9) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
B9 A5, S5, and RS5 owners usually arrive here after asking the factory iron brakes to manage repeated high-speed stops, heavy front-axle heat, or constant wheel dust on open Audi wheels. This StopFlex kit uses a 420mm front carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper, plus a 380mm rear carbon-ceramic rotor with TTSPORT EP4 4-Piston Caliper with EPB, to add thermal capacity while reducing rotating mass and dust versus iron. Each kit is engineered to the confirmed A5, S5, or RS5 trim, with brackets, hat offsets, caliper position, and wheel clearance checked before production.
- 420mm is the largest front rotor size in this B9 A5 / S5 / RS5 kit, so 21 inch wheels are the minimum; wheels under 21 inches will not clear it, and spoke clearance still has to be measured.
- The front axle uses the exact Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper, matched to StopFlex carbon-ceramic rotors, pads, hats, hardware, and lines.
- The rear axle keeps electronic parking brake functionality with the TTSPORT EP4 4-Piston Caliper with EPB on a 380mm carbon-ceramic rotor, so the upgrade is not a front-only brake-bias compromise.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A5 / S5 / RS5 (B9) |
| Model years | 2017-2024 |
| 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 upgrade is built around the Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper, a genuine OEM-derived Audi RS caliper chosen for high pad control, firm pedal response, and even pressure distribution across the 420mm rotor face. Its 10-piston layout gives this B9 A5 / S5 / RS5 kit the clamp stability needed for repeated high-energy stops without using an unproven generic caliper body.
Rear Caliper (Balance)
The TTSPORT EP4 4-Piston Caliper with EPB adds real rear-axle service braking instead of leaving the back of the car on a small factory sliding caliper. It uses four hydraulic service pistons plus a dedicated EPB actuator piston, so factory parking-brake convenience is retained while the 380mm rear rotor adds thermal capacity and rear stability.
Front & rear, engineered together: StopFlex engineers the 420mm front and 380mm rear package as one brake system, not as a front-only swap that leaves rear torque, heat capacity, and EPB function as afterthoughts. The EP4 architecture uses a forged-aluminum body, heat-insulated pistons with dust boots, and an EPB actuator layout suited to modern Audi platforms that require electronic parking brake retention.
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 2017-2024 Audi A5, S5, or RS5 B9?
Fitment is not treated as a platform-wide bolt-on. StopFlex builds the brackets, rotor-hat offsets, and caliper mounting around your confirmed year, trim, body style, hub/upright configuration, and wheel data because A5, S5, and RS5 B9 variants can differ mechanically.
What wheel size do I need for the 420mm front rotor?
The 420mm front rotor requires 21 inch wheels minimum. Wheels under 21 inches will not clear the rotor, and 21 inch wheels still need spoke-clearance verification for the Genuine Akebono OEM Audi RS 10-Piston (10N) Caliper.
Will the electronic parking brake still work?
Yes, this rear setup uses the TTSPORT EP4 4-Piston Caliper with EPB, which has four hydraulic service pistons for braking and a dedicated EPB actuator piston for parking-brake function. The goal is to keep the Audi’s factory EPB convenience while adding a 380mm rear carbon-ceramic brake package.
Why switch a B9 A5, S5, or RS5 to carbon-ceramic brakes instead of staying with iron rotors?
Carbon-ceramic rotors address the common B9 owner goals of lower brake dust, lower rotating mass, and higher heat tolerance during repeated hard stops. This kit is also useful when replacing expensive or worn OEM brake hardware with a complete matched package of calipers, rotors, pads, hats, lines, hardware, and trim-specific mounting.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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