2011-2019 BMW 1 Series (F20/F21) 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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2011-2019 BMW 1 Series (F20/F21) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
F20/F21 1 Series owners usually shop this kit after outgrowing the factory iron brakes on hard mountain driving, repeated high-speed stops, or track sessions where heat and pad transfer can become the limiting factor. This StopFlex kit uses 380mm front carbon-ceramic rotors with Brembo V6 / GT6 / GTS6 6-piston caliper options and 355mm rear carbon-ceramic rotors with Brembo V4 / GT4 / GTS4 4-piston options to add heat capacity while cutting iron-rotor dust and rotating mass. Every bracket, rotor-hat offset, and caliper mount is engineered for the buyer's confirmed F20/F21 trim rather than assumed from the 1 Series chassis name.
- 380mm front carbon-ceramic rotors require 19-inch or larger wheels on the F20/F21 1 Series; spoke clearance must still be checked against the selected Brembo 6-piston caliper.
- Front choices are V6, GT6, or GTS6 6-piston calipers, all paired with the same 380mm front rotor diameter for this kit configuration.
- Rear choices are V4, GT4, or GTS4 4-piston calipers on 355mm carbon-ceramic rotors, so rear torque contribution is engineered with the front upgrade instead of left to the factory rear hardware.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 1 Series (F20/F21) |
| Model years | 2011-2019 |
| 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 F20/F21 a larger fixed-caliper layout for controlled clamping force and a firmer pedal response than a smaller factory sliding-caliper setup. The buyer chooses among V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor; GT6 = Genuine Brembo GT | M6 6-Piston Caliper — 380 mm rotor; and GTS6 = Genuine Brembo GT | S6 6-Piston Caliper — 380 mm rotor. These are genuine Brembo caliper options selected for proven fixed-caliper construction and matched to StopFlex carbon-ceramic rotor hats and brackets for the exact car.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 355mm rotors to keep rear brake contribution aligned with the larger 380mm front package. Because the F20/F21 1 Series uses a manual cable parking brake, this rear section is engineered around mechanical parking-brake compatibility rather than EPB motor retention.
Front & rear, engineered together: The 380mm front and 355mm rear rotor package is specified as a complete system so piston area, rotor diameter, pad choice, and rear contribution are considered together. On a short-wheelbase rear-drive BMW hatchback, a matched front/rear kit avoids the front-only upgrade problem of adding front thermal capacity while leaving rear balance, feel, and appearance behind.
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 kit fit my exact F20 or F21 trim?
Fitment is confirmed per car before production. StopFlex does not treat every F20/F21 as the same bracket package because standard, M Sport, and M Performance trims can differ in knuckle/upright geometry, hub position, brake package, and wheel clearance.
What wheel size do I need for the 380mm front setup?
The 380mm front rotor requires 19-inch or larger wheels. Wheel diameter alone is not enough; the selected Brembo V6, GT6, or GTS6 6-piston caliper also needs spoke clearance based on wheel offset and barrel shape.
Will the parking brake still work?
Yes, the rear package is planned around the F20/F21's manual cable parking brake system. This chassis does not use a factory EPB motor, so there is no electronic parking-brake actuator to retain on the rear caliper.
Why choose carbon-ceramic instead of another iron big brake kit?
Carbon-ceramic rotors reduce brake dust and rotating mass compared with iron rotors, while the 380mm front and 355mm rear diameters add heat capacity for repeated hard stops. The value is strongest for owners who want cleaner open wheels, lower unsprung weight, and a brake package engineered around Brembo fixed calipers rather than factory-sized replacement discs.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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