2017-2024 Audi A5 / S5 / RS5 (B9) 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.
2017-2024 Audi A5 / S5 / RS5 (B9) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
This 2017-2024 Audi A5 / S5 / RS5 B9 kit is for owners who have outgrown the factory iron brake package or want a lower-cost carbon-ceramic replacement path with less dust, less rotating mass, and stronger heat control. 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 on a matching 380mm carbon-ceramic rotor. Every bracket, hat offset, and caliper position is built around the confirmed A5, S5, or RS5 trim instead of treating every B9 chassis as mechanically identical.
- 380mm carbon-ceramic rotors front and rear require 19-inch or larger wheels; wheels under 19 inches will not clear, and spoke clearance must also be checked.
- The front upgrade uses the Genuine Akebono OEM Audi RS 6-Piston (8N) Caliper, giving the B9 A5/S5/RS5 family a large OEM-derived fixed-caliper front package rather than a generic aftermarket casting.
- The rear package retains modern Audi EPB functionality with the TTSPORT EP4 4-Piston Caliper with EPB, so rear thermal capacity is upgraded without deleting the electronic parking brake.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Audi A5 / S5 / RS5 (B9) |
| Model years | 2017-2024 |
| 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 fixed 6-piston OEM-derived Audi RS caliper selected for stable pad loading and firm pedal response under repeated high-speed stops. Its Audi RS provenance matters on the B9 A5/S5/RS5 because the caliper is a genuine performance-platform component, not a cosmetic multi-piston lookalike. StopFlex pairs it with a 380mm carbon-ceramic rotor, billet hat, stainless lines, pads, and trim-specific mounting hardware.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB to add real rear-axle braking capacity while retaining the factory-style electronic parking brake function. Its 4 hydraulic service pistons support rear brake stability and bias control, while the dedicated EPB actuator preserves parking-brake convenience.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 380mm Akebono front package is not paired with an undersized or thermally mismatched rear axle. The TTSPORT EP4 shares the EP4S rear big-brake architecture for modern EPB vehicles, using 4 hydraulic service pistons plus a dedicated EPB actuator piston so the B9 Audi keeps OE parking-brake behavior while gaining matched carbon-ceramic thermal capacity.
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 my exact A5, S5, or RS5 B9 trim?
StopFlex does not treat the B9 chassis as a universal bolt-on fitment. Your kit is engineered after confirming the exact model year, trim, body style, hub/knuckle configuration, wheel size, and offset so the brackets, rotor-hat offsets, and caliper mounting match your car.
What wheel size is required for the 380mm rotors?
The 380mm front and rear rotors require 19-inch or larger wheels. Wheels below 19 inches will not clear, and StopFlex also checks spoke clearance because caliper face clearance can vary by wheel design and ET even when the diameter is correct.
Will the electronic parking brake still work?
Yes. The rear uses the TTSPORT EP4 4-Piston Caliper with EPB, which provides 4 hydraulic service pistons for braking and a dedicated EPB actuator piston for the parking brake, so the B9 Audi retains electronic parking-brake functionality.
Why choose carbon-ceramic over the factory iron brakes on this car?
Carbon-ceramic rotors reduce brake dust, cut rotating and unsprung mass, and maintain heat control better during repeated hard stops than comparable iron rotors. On an A5, S5, or RS5 B9 used for fast street driving, mountain roads, or track days, the 380mm CCB package targets fade resistance and cleaner wheels without relying on a front-only brake mismatch.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
We’re here to help! Whether you need expert advice on brake setups, have questions about your order, or just want to share feedback, our team is ready to assist you. Reach out via your preferred channel below, or use the inquiry form.
Get in Touch
Business Hours
Monday – Saturday, 9:30 AM – 6:30 PM (GMT +8)
Current Time:
Follow Us
- Выбор варианта приводит к полному обновлению страницы.