2019-2026+ BMW 8 Series (G14/G15/G16) Carbon Ceramic Big Brake Kit — Brembo GT6 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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Will This Fit My Car?
Full Upgrade CCB Big Brake Kits (With Calipers) for the 2019-2026+ BMW 8 Series (G14/G15/G16). This page's exact brake setup:
| Model Years | Front Setup | Rear Setup | Min. Wheel Size |
|---|---|---|---|
| 2019-2026+ |
Option 1: Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor Option 2: Brembo GT | M6 6-Piston Caliper — 380 mm rotor Option 3: Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355/380 mm rotor Option 2: Brembo GT | M4 4-Piston Caliper — 355/380 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355/380 mm rotor |
19" |
Every StopFlex kit is bespoke-engineered for your exact model and trim — brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, never assumed from the platform. Trims that share a chassis name can differ mechanically: a pure performance variant often carries different knuckles, hub geometry, and wheel ET clearance than the standard models, so parts that bolt onto one are not the parts that fit the other. Calipers, pads, rotor hats, floating hardware, and brake lines ship as one matched system built to your confirmed trim. Modified knuckles, uprights, or non-factory suspension mounting points must be reviewed before ordering.
The 380 mm rotor sets the minimum wheel size at 19" — smaller wheels will not clear the caliper and rotor. Spoke profile and offset also affect clearance; 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 |
What's in the Box
| Item | Details |
|---|---|
| Product type | Full Upgrade CCB Big Brake Kits (With Calipers) |
| Front calipers |
Option 1: Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor OE / Part No.: L 172-2521 · R 172-2522 Option 2: Brembo GT | M6 6-Piston Caliper — 380 mm rotor Option 3: Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
| Rear calipers | Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 / 380 mm rotor Option 2: Brembo GT | M4 4-Piston Caliper — 355 / 380 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355 / 380 mm rotor OE / Part No.: L 172-2523 · R 172-2524 |
| CCB brake pads | Matched ceramic-compatible compound for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| 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. |
Make It Yours — Color & Logo Customization
Specify custom caliper colors, a custom caliper logo, and custom rotor hat colors on any kit order — the finished package matches your build instead of a standard catalog look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why Carbon Ceramic — and Why StopFlex
CCB-Specific Pad Compound
A low-metallic resin pad compound reinforced with steel, copper, and aramid fiber, made for ceramic discs: stable to about 750 °C, roughly 0.44 average friction, strong fade resistance, low rotor wear.
Lower Unsprung Mass
A carbon-ceramic rotor weighs roughly half of the equivalent iron disc. Less rotating, unsprung mass lets the suspension follow broken pavement more cleanly and makes steering response noticeably sharper.
High-Temperature Stability
The carbon-silicon-carbide friction matrix keeps working at temperatures that push iron rotors into heavy fade, so the tenth hard stop feels like the first — same pedal travel, same bite point.
Rust-Free Rotor Surface
Ceramic discs cannot flash-rust. After rain, a wash, or weeks of parking, the rotor face behind your open-spoke wheels stays clean — no orange ring on a freshly detailed car.
Long Street-Service Life
In normal road use with matched pads and correct bedding, one StopFlex CCB rotor set is engineered to outlast several sets of iron replacement rotors, recovering part of the up-front cost.
Low Visible Dust
Matched with StopFlex pads, the system sheds a fraction of the dust an iron rotor and pad combination throws. Wheels stay clean for weeks of driving instead of days.
Premium Ceramic-Glaze Finish
StopFlex's proprietary coating gives the disc a bright ceramic-glaze surface with subtle texture — the factory carbon-ceramic look, clearly visible through open wheel designs.
Continuous Fiber Construction
StopFlex discs are built with long continuous carbon fiber instead of chopped short fiber. Continuous strands carry load across the whole rotor body, raising strength and thermal durability under heat cycles.
Bespoke Per-Vehicle Engineering
Every order is machined to the confirmed vehicle and trim. Brackets, hat offsets, and pad shapes are built for that exact car — never pulled from a one-size-fits-all catalog.
Winter & Cold-Weather Braking
A cold, untuned carbon-ceramic disc needs more pedal than iron on the first winter stops — normal material physics. StopFlex engineered the pad formula and disc coating specifically for cold starts, closing that gap: cold-car winter feel is now very close to summer feel. Keep a little extra distance on the coldest mornings; for harsh winters, choose Street Spec.
Caliper Overview
Front Caliper
The front runs the Brembo GT | M6 6-piston caliper over a 380 mm carbon-ceramic rotor, giving the heavy M850i front axle consistent clamping and a firm pedal that holds up on repeated hard stops. You can also spec the front as the Brembo OEM Cadillac CTS-V 6-piston (V6) or the Brembo GT | S6 6-piston (GTS6), each on the 380 mm rotor.
Rear Caliper
The rear pairs a Brembo 4-piston caliper with a 355 or 380 mm carbon-ceramic rotor to add real thermal capacity at the back and balance the big front setup. Choose among the V4 (Cadillac CTS-V OEM), GT4 (GT | M4), or GTS4 (GT | S4) options, all engineered to retain the factory electronic parking brake.
Choose Your Rotor: Street, Track-Day, or Motorsport
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.
Heat Management Note
Ceramic discs shrug off surface temperatures that would destroy iron, but the rest of the system still heats up: pads, fluid, seals, calipers, and wheels all absorb soak heat during repeated hard stops. For track days, long descents, and sustained hard driving, run brake cooling and high-temperature fluid.
Get Your Fitment Confirmed
Share your year, model, trim, wheel size, current rotor dimensions, and caliper type — every order is verified against your VIN-level configuration before it goes to production.
FAQ
Will this fit my exact 8 Series — coupe, convertible, or Gran Coupe?
Each kit is built for your confirmed trim, not the G14/G15/G16 platform as a whole. Body style and drivetrain affect knuckle geometry and wheel clearance, so we match the brackets, caliper mounting, and rotor-hat offsets to your specific 840i or M850i xDrive after you confirm year, trim, and wheel details. We do not ship a generic bolt-on and assume it fits.
What wheels do I need to clear the 380 mm rotors?
The 380 mm front rotor with the 6-piston Brembo caliper requires a minimum 19-inch wheel; anything smaller will not clear the caliper. Spoke shape matters as much as diameter, so send us your wheel specs or photos and we'll verify caliper-to-spoke clearance before you order.
How do these carbon-ceramic brakes behave in winter and on cold mornings?
A cold carbon-ceramic disc naturally bites a little less than cold iron on the very first stops — that's physics, not a fault. We tune both the pad compound and the disc's ceramic coating for cold starts, so cold-car feel on the 8 Series now comes very close to warm summer feel. On the coldest first few stops, leave a bit of extra following distance until the system comes up to temperature.
Does the rear kit keep the factory electronic parking brake?
Yes. The G14/G15/G16 uses a factory electronic parking brake at the rear, and the rear caliper option — V4, GT4, or GTS4 on a 355 or 380 mm rotor — is engineered to retain full EPB function. No conversion or aftermarket lever is needed.
More Contact Information
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