2018-2024 BMW X3 / X3 M (G01/F97) CCB Big Brake Kit | Akebono 10N 10-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 Akebono OEM Porsche 10-Piston (10N) Caliper Front + Genuine Brembo OEM Porsche 19Z 4-Piston Caliper Rear Setup
The 2018-2024 BMW X3 G01/F97 owner shopping this kit is usually trying to solve heat, dust, rotor mass, or appearance limits from the factory brake package without guessing at fitment across standard and M chassis variants. This StopFlex Kit Upgrade pairs a 420mm front carbon-ceramic rotor with the Genuine Akebono OEM Porsche 10-Piston (10N) Caliper and a 380mm rear carbon-ceramic rotor with the Genuine Brembo OEM Porsche 19Z 4-Piston Caliper. Each kit is engineered to the customer's exact X3 trim, with brackets, rotor-hat offsets, caliper position, hardware, lines, and wheel clearance checked before the kit is built.
- 420mm front and 380mm rear carbon-ceramic rotors add thermal capacity for a heavy AWD X3 while reducing iron-rotor dust on open 21-inch and larger wheel setups.
- The front axle uses the exact Genuine Akebono OEM Porsche 10-Piston (10N) Caliper; the rear axle uses the Genuine Brembo OEM Porsche 19Z 4-Piston Caliper to keep the conversion engineered as a full-system brake package.
- Because the X3 G01 and X3 M F97 can differ in knuckles, hub geometry, brake mounts, and wheel offsets, StopFlex builds the brackets and rotor hats only after the exact trim and wheel package are confirmed.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW X3 (G01/F97) |
| Model years | 2018-2024 |
| Front setup | Genuine Akebono OEM Porsche 10-Piston (10N) Caliper / 420mm |
| Rear setup | Genuine Brembo OEM Porsche 19Z 4-Piston Caliper / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 21" (for the 420 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 420 mm front rotor, so the minimum wheel size is 21". Wheels under 21" 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 Akebono OEM Porsche 10-Piston (10N) Caliper, giving the 420mm rotor a large multi-piston clamp profile for controlled pressure distribution and firm pedal response. This is an OEM-derived Porsche caliper, not an unbranded universal casting, which gives the kit a proven performance-caliper foundation. StopFlex mounts it with vehicle-specific brackets, hats, hardware, and lines matched to the confirmed BMW X3 G01 or F97 trim.
Rear Caliper (Balance)
The rear axle uses the Genuine Brembo OEM Porsche 19Z 4-Piston Caliper with a 380mm carbon-ceramic rotor to support rear brake contribution without making the front upgrade work alone. On EPB-equipped X3 applications, StopFlex verifies the rear configuration needed to retain factory electronic parking brake behavior before final build.
Front & rear, engineered together: The 420mm front and 380mm rear package is treated as one brake system so piston area, rotor diameter, caliper position, and rear brake function are not left to a front-only conversion. That matters on the AWD X3 because braking stability depends on front bite, rear contribution, ABS behavior, and correct rotor-hat geometry working 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 Akebono OEM Porsche 10-Piston (10N) Caliper |
| Front CCB rotors | 420mm |
| Rear calipers | Genuine Brembo OEM Porsche 19Z 4-Piston Caliper |
| 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. |
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 420mm kit fit my exact 2018-2024 BMW X3 trim?
StopFlex does not treat G01 and F97 as one universal fitment. Your exact trim, factory brake package, hub/knuckle configuration, wheel size, wheel offset, and spoke clearance are confirmed before the brackets, rotor hats, caliper mounts, lines, and hardware are finalized.
What wheel size is required for the 420mm front rotor?
The 420mm front rotor requires at least a 21-inch wheel. Wheels under 21 inches will not clear the rotor, and 21-inch wheels still need spoke-clearance verification for the Genuine Akebono OEM Porsche 10-Piston (10N) Caliper.
Will the electronic parking brake still work?
The 2018-2024 BMW X3 G01/F97 uses an electronic parking brake, so StopFlex checks the rear setup around EPB retention before the kit is built. Rear caliper, bracket, line, and parking-brake requirements are confirmed against the customer's exact trim rather than assumed from the chassis code.
Why choose carbon-ceramic instead of another iron big-brake kit?
Carbon-ceramic rotors reduce brake dust and rotor mass compared with iron while adding heat capacity for repeated high-speed braking. On this X3 kit, the 420mm front rotor and 380mm rear rotor are matched to OEM-derived Porsche calipers for a full conversion rather than a cosmetic caliper swap.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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