2012-2018 BMW 3 Series / M3 (F30/F31/F80) CCB 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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2012-2018 BMW 3 Series / M3 (F30/F31/F80) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
F30/F31 3 Series and F80 M3 owners usually shop carbon ceramic brakes for repeated heat, front-rotor mass, brake dust on open wheels, or the cost of replacing worn performance brakes. This StopFlex kit pairs 380 mm front carbon-ceramic rotors with Brembo V6 / GT6 / GTS6 6-piston caliper options and 355 mm rear carbon-ceramic rotors with Brembo V4 / GT4 / GTS4 4-piston options. Every kit is built around the confirmed trim, wheel package, bracket geometry and rotor-hat offset, which matters because a standard F30/F31 and an F80 M3 do not share every brake-clearance assumption.
- 380 mm front carbon-ceramic rotors require 19 inch or larger wheels on the F30/F31/F80, and spoke clearance is checked because the 6-piston Brembo body sits farther outboard than many factory calipers.
- Front choices are V6, GT6 or GTS6 Brembo 6-piston calipers on a 380 mm rotor; rear choices are V4, GT4 or GTS4 Brembo 4-piston calipers on a 355 mm rotor.
- StopFlex does not treat F30, F31 and F80 as one universal fitment because M and non-M versions can differ in uprights, hub geometry, factory brake package and wheel ET clearance.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 3 Series / M3 (F30/F31/F80) |
| Model years | 2012-2018 |
| Front setup | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options / 380mm |
| Rear setup | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options / 355mm |
| 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 Brembo V6 / GT6 / GTS6 6-Piston Caliper Options, giving the buyer a choice among V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper on a 380 mm rotor, GT6 = Genuine Brembo GT | M6 6-Piston Caliper on a 380 mm rotor, or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper on a 380 mm rotor. The 6-piston layout spreads pad pressure across a larger swept area than the factory front brake, supporting consistent clamping force and pedal response as rotor temperature rises. Each option uses a genuine Brembo caliper architecture rather than a generic casting.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 355 mm carbon-ceramic rotors, matched to the front 380 mm system so rear contribution is part of the brake balance rather than an afterthought. The F30/F31/F80 family uses a mechanical handbrake-style parking brake system rather than an EPB rear caliper motor, so EPB retention is not a rear-caliper issue on this listing.
Front & rear, engineered together: The 380 mm front and 355 mm rear rotor package is engineered as a complete system so piston area, rotor diameter, hat offset and bracket position are matched to the confirmed vehicle. That matters on this BMW family because installing a large front-only setup without matching rear engineering can change pedal feel, ABS behavior and braking stability.
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 | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options |
| Front CCB rotors | 380mm |
| Rear calipers | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options |
| Rear CCB rotors | 355mm |
| 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. |
| Front caliper option mapping | V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor GT6 = Genuine Brembo GT | M6 6-Piston Caliper — 380 mm rotor GTS6 = Genuine Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
| Rear caliper option mapping | V4 = Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 mm rotor GT4 = Genuine Brembo GT | M4 4-Piston Caliper — 355 mm rotor GTS4 = Genuine Brembo GT | S4 4-Piston Caliper — 355 mm rotor |
FAQ
Will this StopFlex kit fit my exact F30, F31 or F80 trim?
Fitment is confirmed by exact model, trim, factory brake package and wheel setup before production. StopFlex builds the brackets, rotor-hat offsets and caliper mounting for that specific car, not for a generic F30/F31/F80 platform claim.
What wheel size do I need for the 380 mm front rotor?
The 380 mm front rotor requires 19 inch or larger wheels. Final clearance also depends on spoke shape, barrel profile and offset, so StopFlex checks the wheel specification before confirming the Brembo 6-piston package.
Does this BMW listing need EPB-compatible rear calipers?
No. The 2012-2018 F30/F31 3 Series and F80 M3 use a mechanical handbrake-style parking brake layout rather than electric motors on the rear calipers, so the rear 4-piston Brembo package is engineered around hydraulic braking and the parking-brake hardware separately.
Why switch this car to carbon-ceramic rotors instead of another iron setup?
Carbon-ceramic rotors reduce brake dust and rotor mass compared with iron while maintaining heat capacity for repeated high-speed braking. On an F80 M3 or a modified F30/F31, the main reasons are cleaner wheels, less unsprung weight at the corners, and better resistance to heat-related fade when the factory iron brakes are pushed hard.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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