2021-2026+ BMW 4 Series / M4 (G22/G23/G26/G82/G83) 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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2021-2026+ BMW 4 Series / M4 (G22/G23/G26/G82/G83) CCB Big Brake Kit — Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper Front + Genuine Brembo GT4 Rear Setup
The 2021-2026+ BMW 4 Series and M4 owner shopping carbon-ceramic brakes is usually trying to solve heat fade, iron-rotor dust, or the cost of replacing factory CCB components after track use. 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 a 355 mm carbon-ceramic rotor and Brembo V4, GT4, or GTS4 4-piston option. Because G22/G23/G26 standard cars and G82/G83 M4 models do not share every brake-mounting and clearance detail, each kit is engineered around the confirmed trim, hub geometry, rotor-hat offset, and wheel package.
- 380 mm is the largest rotor in this kit, so 19-inch wheels are the minimum; barrel and spoke clearance still must be checked against the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper.
- Rear choices are mapped to the same 355 mm carbon-ceramic rotor: V4 = Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper, GT4 = Genuine Brembo GT | M4 4-Piston Caliper, and GTS4 = Genuine Brembo GT | S4 4-Piston Caliper.
- Fitment is confirmed separately for G22/G23/G26 4 Series and G82/G83 M4 trims because M cars can use different uprights, hub geometry, brake electronics, and wheel ET clearance from standard 4 Series models.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 4 Series / M4 (G22/G23/G26/G82/G83) |
| Model years | 2021-2026+ |
| 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 axle uses the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, giving this BMW kit a large fixed-caliper footprint with six pistons distributing clamp load across the pad for consistent pedal response under repeated high-energy stops. Its value is provenance: it is a genuine Brembo OEM-derived performance caliper, not an unknown generic casting. StopFlex engineers the caliper bracket, rotor centerline, and 380 mm carbon-ceramic rotor package around the customer's exact G22, G23, G26, G82, or G83 configuration.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on a 355 mm carbon-ceramic rotor, giving the rear brakes enough authority to support stability and brake balance instead of leaving the car with a front-heavy conversion. Rear EPB integration is handled during vehicle-specific engineering where the confirmed trim uses BMW's factory electronic parking brake system.
Front & rear, engineered together: The front 380 mm 6-piston setup and rear 355 mm 4-piston setup are specified as a system so piston area, rotor torque, pad choice, and rear stability are not treated as separate guesses. That matters on the G22/G23/G26/G82/G83 family because a front-only upgrade can change brake bias and ABS behavior if the rear hardware is not matched to the final vehicle configuration.
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 |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
FAQ
Will this kit fit my exact 430i, M440i, or M4 trim?
Fitment is not treated as universal across G22/G23/G26/G82/G83. StopFlex confirms your exact model, trim, drivetrain, factory brake package, hub geometry, and wheel data, then builds the brackets, rotor-hat offsets, and caliper mounting around that car.
What wheel size do I need for the 380 mm front rotor?
The 380 mm front rotor requires 19-inch wheels or larger; wheels under 19 inches will not clear the rotor. Spoke shape, barrel profile, and wheel ET also matter because the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper is physically larger than many factory BMW calipers.
Will the electronic parking brake still work?
This BMW generation includes factory electronic parking brake hardware, so EPB compatibility must be addressed in the rear configuration. StopFlex verifies the customer's exact rear brake and EPB layout before finalizing the Brembo V4, GT4, or GTS4 355 mm rear package.
Why switch from the factory BMW iron or carbon setup to this StopFlex CCB kit?
Carbon-ceramic rotors reduce brake dust compared with iron rotors and cut rotating unsprung weight, which is noticeable on open-wheel BMW 4 Series and M4 builds. For track use, the 380 mm front and 355 mm rear carbon-ceramic rotor package adds thermal capacity and avoids the dealer-level cost structure of replacing factory BMW carbon-ceramic components.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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