2018-2024 BMW X3 / X3 M (G01/F97) CCB Big Brake Kit | Brembo BMW M5 F90 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2018-2024 BMW X3 (G01/F97) CCB Big Brake Kit — Genuine Brembo BMW M5 F90 6-Piston Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
This StopFlex kit is built for 2018-2024 BMW X3 G01 and F97 owners who want more heat capacity and less brake dust than the factory iron setup without guessing on fitment. The front axle uses a Genuine Brembo OEM BMW M5 F90 6-Piston Caliper over a 400mm carbon-ceramic rotor, while the rear uses a TTSPORT EP4 4-Piston Caliper with EPB over a 380mm rotor to keep rear-axle braking and parking-brake function integrated. Because G01 standard models and F97 X3 M variants do not share every brake-mounting and wheel-clearance detail, StopFlex builds the brackets, rotor hats, and caliper placement to the exact confirmed trim.
- 400mm front carbon-ceramic rotors require 20-inch or larger wheels on this X3 kit; wheels under 20 inches will not clear, and spoke clearance must still be checked.
- Front braking is handled by the Genuine Brembo OEM BMW M5 F90 6-Piston Caliper, matched to a 400mm rotor for higher front-axle thermal capacity on the G01/F97 chassis.
- The rear package uses a 380mm carbon-ceramic rotor with a TTSPORT EP4 4-Piston Caliper with EPB, so the X3 retains electronic parking-brake function instead of deleting it.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW X3 (G01/F97) |
| Model years | 2018-2024 |
| Front setup | Genuine Brembo OEM BMW M5 F90 6-Piston Caliper / 400mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 20" (for the 400 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 400 mm front rotor, so the minimum wheel size is 20". Wheels under 20" 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 BMW M5 F90 6-Piston Caliper, supplied as the OEM BMW M5 (F90) caliper option for this kit. Its six-piston layout spreads clamping load across the pad face for stable pedal response and controlled pressure distribution on the 400mm carbon-ceramic rotor. Because it is a genuine OEM-derived Brembo unit from the BMW M5 F90 application, it gives the X3 buyer a known high-performance caliper architecture rather than an unproven generic casting.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB on a 380mm carbon-ceramic rotor to add rear thermal capacity while preserving the BMW electronic parking brake. Its four hydraulic service pistons support rear brake contribution under hard stops, while the dedicated EPB actuator keeps the factory parking-brake function available.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 400mm front rotor and 380mm rear rotor work with matched caliper placement, hat offsets, and hydraulic balance instead of adding front capacity while leaving the rear axle thermally mismatched. The TTSPORT EP4 architecture uses four hydraulic service pistons plus a dedicated EPB actuator piston, allowing the rear upgrade to support stability and OE-style EPB convenience together.
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 BMW M5 F90 6-Piston Caliper |
| Front CCB rotors | 400mm |
| Rear calipers | TTSPORT EP4 4-Piston Caliper with EPB |
| Rear CCB rotors | 380mm |
| 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 | OEM BMW M5 (F90) caliper, supplied as the Genuine Brembo OEM BMW M5 F90 6-Piston unit. |
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. |
TTSPORT EP4S rear caliper specification (the EP4 shares the same engineering, slightly more compact):
| Specification | EP4S |
|---|---|
| Axle position | Rear |
| Piston count | 4 hydraulic + 1 EPB actuator |
| Piston type | Two-piece heat-insulated, dust boots + EPB actuator |
| Piston diameter | 28 mm × 4 / 27 mm × 1 |
| Total piston area | 30.4 cm² per caliper |
| Manufacturing process | Two-piece forged aluminum body |
| Net weight | 4.50 kg per caliper (no pads) |
| Surface finish | High-temperature gloss coating |
| Recommended wheel size | 18 in or larger |
FAQ
Will this kit fit every 2018-2024 BMW X3 G01 or F97 the same way?
No. StopFlex builds this kit to the exact confirmed year, trim, and wheel setup because a standard G01 X3 and an F97 X3 M can differ in front knuckles, hub geometry, brake mounting, and wheel offset clearance. Brackets, rotor-hat offsets, and caliper mounting are matched to your specific vehicle before production.
What wheel size is required for the 400mm front rotor?
This kit requires 20-inch or larger wheels because the front rotor is 400mm. Diameter alone is not enough; StopFlex also checks spoke clearance against the Genuine Brembo OEM BMW M5 F90 6-Piston Caliper before finalizing the build.
Will the electronic parking brake still work?
Yes. The rear package uses the TTSPORT EP4 4-Piston Caliper with EPB, which keeps electronic parking-brake operation while adding a 380mm rear carbon-ceramic rotor and four hydraulic service pistons for braking.
Why switch this X3 from iron brakes to carbon ceramic?
Carbon-ceramic rotors are selected for heat capacity, lower brake dust, corrosion resistance, and reduced rotating mass compared with iron rotors. On a heavier performance SUV like the X3 G01/F97, the 400mm front and 380mm rear setup is aimed at repeated high-energy braking without the dust and heat load of the factory-style iron system.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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