2011-2019 BMW 1 Series (F20/F21) CCB Big Brake Kit | Brembo GT500 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 OEM Ford Shelby GT500 Mustang 6-Piston Caliper Front + Genuine Brembo GT4 Rear Setup
F20/F21 1 Series owners usually arrive here after repeated heat fade, heavy iron-rotor dust, or a front brake package that cannot keep pace with tuned M135i/M140i-style power. This StopFlex kit pairs a 380 mm front carbon-ceramic rotor with the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, then matches the rear with 355 mm carbon-ceramic rotors and Brembo 4-piston options for stable brake balance. The carbon-ceramic package adds heat capacity and fade resistance while cutting rotating mass and visible dust, with brackets and hat offsets engineered for the buyer’s confirmed F20/F21 trim rather than assumed from the chassis code.
- 380 mm front carbon-ceramic rotors require 19-inch or larger wheels on the F20/F21; spoke clearance and wheel offset must still be checked before production.
- Front braking is built around the exact Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, paired to StopFlex carbon-ceramic rotors, pads, hats, hardware, and lines.
- Rear choices use 355 mm rotors with Brembo V4, GT4, or GTS4 4-piston caliper options so the rear axle is engineered with the front upgrade instead of left as an unmatched factory system.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 1 Series (F20/F21) |
| Model years | 2011-2019 |
| Front setup | Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper / 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 upgrade uses the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, giving the F20/F21 a six-piston fixed-caliper layout for broad pad support, strong clamping force, and a firmer pedal than a small sliding-caliper setup. Its OEM-performance provenance matters because the caliper was built for a high-output production Mustang application, not an unproven decorative big-brake shell. StopFlex adapts this caliper to the customer’s exact BMW trim with matched brackets, carbon-ceramic rotor hats, pads, hardware, and stainless lines.
Rear Caliper (Balance)
The rear axle is matched with Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 355 mm carbon-ceramic rotors: V4 uses the Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper, GT4 uses the Genuine Brembo GT | M4 4-Piston Caliper, and GTS4 uses the Genuine Brembo GT | S4 4-Piston Caliper. These rear options help maintain braking stability and bias behind the 380 mm six-piston front package; the F20/F21 uses a manual cable handbrake rather than a factory EPB caliper.
Front & rear, engineered together: A 380 mm six-piston front conversion changes front torque capacity, heat capacity, and pedal response, so the 355 mm 4-piston rear package is specified as part of the same system. StopFlex engineers the front and rear rotor hats, brackets, pads, lines, and caliper positions together so the car is not left with a high-capacity front axle and an under-matched rear axle.
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 Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper |
| 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. |
| 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/F21 trim?
Fitment is confirmed per car before production. A 116i, 120d, M Sport, M135i, or M140i can differ in knuckle/upright details, hub geometry, brake package, and wheel clearance, so StopFlex matches the brackets, rotor-hat offsets, and caliper mounting to the customer’s confirmed trim rather than selling one platform-wide bracket set.
What wheel size do I need for the 380 mm front rotors?
The 380 mm front carbon-ceramic rotor requires 19-inch or larger wheels. Wheel diameter alone is not enough; StopFlex also checks spoke clearance, offset, and inner barrel shape against the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper.
Will the parking brake still work?
Yes, the F20/F21 1 Series uses a manual cable handbrake rather than a factory EPB rear caliper. The rear brake specification is handled around that cable-operated parking-brake layout during fitment confirmation.
Why choose carbon-ceramic instead of another iron big-brake kit?
For an F20/F21 used hard on road or track, carbon-ceramic rotors reduce brake dust, resist heat-related fade, and cut rotating mass compared with similarly sized iron rotors. This kit also provides the visual and thermal headroom of a 380 mm front and 355 mm rear package without relying on factory BMW iron rotor sizing.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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