2019-2026+ BMW 3 Series / M3 (G20/G21/G80/G81) Carbon Ceramic Big Brake Kit — Alcon RC6
Official Warranty: We offer a 1-year free replacement for quality defects or coating issues under normal (non-track) use. Please note that provided specs apply strictly to brake hats and brackets; wheel fitment data is for general reference only. Wheel clearance issues are excluded from warranty coverage and data accuracy claims. If additional clearance is needed, wheel spacers must be added at the customer's discretion.
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Will This Fit My Car?
Full Upgrade CCB Big Brake Kits (With Calipers) for the 2019-2026+ BMW 3 Series / M3 (G20/G21/G80/G81). This page's exact brake setup:
| Model Years | Front Setup | Rear Setup | Min. Wheel Size |
|---|---|---|---|
| 2019-2026+ | Alcon RC6 6-Piston Caliper / 380mm | Alcon RC4 4-Piston Caliper / 380mm | 19" |
This kit is built per car, not per platform. We engineer the brackets, rotor-hat offsets, and caliper mounting to your confirmed model and trim, because trims sharing a chassis name frequently differ underneath — performance variants can run different knuckles, hub geometry, and wheel ET clearance than their standard siblings. You receive calipers, pads, rotor hats, floating hardware, and brake lines as one matched, trim-specific system. Cars with modified knuckles, uprights, or non-factory suspension mounting points need review 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 | Alcon RC6 6-Piston Caliper OE / Part No.: L CAR7059Y04HZLT · R CAR7059Y04HZRT |
| Front CCB rotors | 380mm |
| Rear calipers | Alcon RC4 4-Piston Caliper OE / Part No.: L CAR6959B08HZLL · R CAR6959B08HZRT |
| Rear CCB rotors | 380mm |
| Rotor construction | Short-Fiber Street Spec (lower price, street-only) or Long-Fiber Street / Track-Day / Motorsport Spec — chosen at order confirmation |
| 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
Any kit order can be personalized: custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the hardware behind your wheels matches the rest of the build.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why Carbon Ceramic — and Why StopFlex
Low Visible Dust
Matched StopFlex pads are selected for low visible dust on the ceramic friction surface. Actual wheel dust still varies with pad choice, traffic, temperature, bedding and driving intensity.
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.
Short-Fiber or Long-Fiber — Your Call
Every StopFlex disc is true carbon-ceramic. Short-Fiber Street Spec uses a simpler chopped-fiber process for a lower price and street-only duty; the Long-Fiber line uses continuous carbon strands that carry load across the whole rotor for higher strength and thermal durability — the pick for track and race heat.
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.
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 like-size carbon-ceramic rotor can be materially lighter than an iron disc; the exact saving depends on rotor dimensions. Lower rotating, unsprung mass can reduce the load the suspension has to control.
High-Temperature Stability
The carbon-silicon-carbide friction material is selected for high-temperature stability and fade resistance. Overall pedal feel still depends on pad condition, fluid, caliper stiffness, cooling and operating temperature.
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, carbon-ceramic friction surfaces are designed for low wear. Actual service life depends on mileage, contamination, pad choice, heat cycles and driving use.
Winter & Cold-Weather Braking
On a freezing start, carbon-ceramic friction can feel different from warm operation. StopFlex pairs the disc coating with its matched street pad to improve cold response; it is still prudent to leave extra margin for the first stops in severe cold. Use a Street Spec for harsh-winter daily service.
Caliper Overview
Front Caliper
The front upgrade uses the Alcon RC6 6-Piston Caliper with a 380mm StopFlex carbon-ceramic rotor. Front brackets and hat offset are specified only after exact model and trim confirmation.
Rear Caliper
The rear upgrade uses the Alcon RC4 4-Piston Caliper with a 380mm StopFlex carbon-ceramic rotor. Rear mounting and electronic parking-brake integration are confirmed for the exact vehicle configuration.
Choose Your Rotor: Short-Fiber Street to Long-Fiber Motorsport
Pick by how you drive and what you want to spend. Street-only and budget-minded: Short-Fiber Street Spec. Premium street, track days, or competition: one of the three Long-Fiber specs, whose continuous carbon strands carry the strength and heat margin that repeated hard braking demands.
Short-Fiber Street Spec
Chopped short-fiber carbon-ceramic body, ceramic coating, cross-drilled face.
Choose this for street-only use when purchase price matters most. It keeps the carbon-ceramic friction surface and coated finish, but it is not specified for track sessions.
Long-Fiber Street Spec
Continuous long-fiber body, ceramic coating, cross-drilled face, large cooling channels.
Choose this for daily and fast-road use when you want the long-fiber construction without moving to a track-focused face and cooling specification.
Long-Fiber Track-Day Spec
Continuous long-fiber body, ceramic coating, blank face, honeycomb cooling channels.
Choose this for repeated fast-road or track-day braking where thermal duty matters more than the drilled street appearance. High-temperature fluid and appropriate cooling still matter.
Long-Fiber Motorsport Spec
Continuous long-fiber body, uncoated blank face, honeycomb cooling channels.
Choose this for competition-focused use with the corresponding pad, fluid, cooling and warm-up strategy. It is not the default recommendation for a street-driven car.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat still soaks 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.
Get Your Fitment Confirmed
Before ordering, provide the exact vehicle, current rotor sizes, caliper type, and wheel details. Production starts only after the configuration is confirmed; VIN/build data is requested when it is needed to resolve fitment.
FAQ
Does this kit fit every G20, G21, G80, and G81?
No. This listing covers the 2019-2026+ BMW 3 Series / M3 G20, G21, G80, and G81 family, but it is built around the confirmed exact model and trim. Brackets, rotor-hat offsets, and caliper mounting are not assumed to transfer between trims simply because the chassis code is shared.
Which StopFlex rotor specification should I choose?
Choose Short-Fiber Street Spec for lower-cost street-only use. Long-Fiber Street is the next step for higher-duty road use, while Long-Fiber Track-Day and Motorsport are for progressively greater heat and duty requirements. Confirm how the car is used before ordering so the rotor specification matches the intended service.
What should I expect in cold or winter driving?
An untuned cold carbon-ceramic disc can have less initial bite than cold iron. StopFlex specifies a matched pad compound and disc coating to reduce that cold-start gap, but the coldest first stops still deserve extra margin. This kit uses matched carbon-ceramic-specific pads rather than treating the rotor choice as a standalone change.
Will my wheels clear the 380mm kit and electronic parking brake?
The largest supplied rotor is 380mm, and the Python fitment chart sets a 19-inch minimum wheel size. Diameter alone is not enough: wheel spoke profile and offset require physical clearance confirmation. This vehicle family uses an electronic parking brake, so the exact rear configuration is confirmed during the bespoke fitment process.
More Contact Information
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