2017-2023 BMW 5 Series / M5 (G30/G31/F90) 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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2017-2023 BMW 5 Series / M5 (G30/G31/F90) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
The 2017-2023 G30/G31 5 Series and F90 M5 are heavy, fast BMWs that can overheat iron rotors in repeated high-speed braking and coat open wheels with brake dust in daily use. This StopFlex kit pairs 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 Caliper Options to add heat capacity, reduce rotating mass, and keep brake balance engineered as a complete system. Fitment is built around the customer’s exact trim, not assumed from the G30/G31/F90 platform name.
- Front fitment uses a 380mm carbon-ceramic rotor with Brembo V6, GT6, or GTS6 6-piston caliper options; wheels smaller than 19 inches will not clear the rotor.
- Rear fitment uses a 355mm carbon-ceramic rotor with Brembo V4, GT4, or GTS4 4-piston caliper options to keep the rear axle matched to the front upgrade.
- Standard G30/G31 5 Series trims and the F90 M5 can use different front knuckles, hub geometry, and wheel offsets, so StopFlex confirms the exact trim before finalizing brackets and hat offsets.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 5 Series / M5 (G30/G31/F90) |
| Model years | 2017-2023 |
| 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 380mm rotor a rigid multi-piston clamping layout for consistent pedal response under repeated hard stops. 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, or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper — 380 mm rotor. Each option is a genuine Brembo caliper foundation paired with StopFlex carbon-ceramic rotors, hats, pads, lines, and vehicle-specific mounting hardware.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on a 355mm rotor, so rear braking contribution is matched to the front 380mm upgrade instead of left as an under-braked rear axle. Rear EPB integration is handled during the trim-specific engineering review because G30/G31/F90 cars use electronic parking brake hardware.
Front & rear, engineered together: StopFlex engineers the 380mm front and 355mm rear package as one brake system, with rotor sizing, caliper selection, hat offset, and mounting geometry matched to the confirmed BMW trim. That matters on the 5 Series/M5 family because mixing a large front kit with an unchanged or incorrectly offset rear setup can change pedal feel, bias, and stability during high-speed braking.
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 |
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 G30, G31, or F90 trim?
Fitment is confirmed to the specific car before production. StopFlex matches brackets, rotor-hat offsets, caliper mounting, and line routing to the confirmed trim because a G30 540i, G30 M550i, G31 Touring, and F90 M5 can differ mechanically even though they sit in the same 5 Series family.
What wheels are required for the 380mm front rotor?
The 380mm front rotor requires at least a 19-inch wheel; wheels under 19 inches will not clear the rotor. Spoke shape, barrel profile, offset, and caliper face clearance still have to be checked because the Brembo V6 / GT6 / GTS6 6-piston front caliper occupies more space than many factory sliding or compact fixed calipers.
Will the electronic parking brake and Auto Hold still work?
The G30/G31/F90 platform uses an electronic parking brake, so StopFlex reviews rear EPB compatibility during the exact-trim build process. Rear caliper and hardware selection are not finalized from the chassis code alone; the order is checked against the customer’s factory rear brake and parking-brake configuration.
Why switch this BMW from iron brakes or factory carbon-ceramics to StopFlex CCB?
Compared with iron rotors, carbon-ceramic rotors reduce brake dust and rotating mass while improving resistance to heat-related fade in repeated high-speed stops. For cars already equipped with OEM carbon-ceramics, the StopFlex package is a complete caliper, rotor, pad, hat, line, and hardware solution built around the confirmed BMW trim instead of a dealer-only rotor replacement path.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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