2024-2026+ Zeekr X CCB Big Brake Kit | Brembo GT350 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2024-2026+ Zeekr X CCB Big Brake Kit — Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
The Zeekr X is a quick, heavy EV crossover, so repeated high-speed braking loads the front axle harder than the factory street brake package was designed to manage. This StopFlex kit pairs a Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper with a 390mm front carbon-ceramic rotor and a TTSPORT EP4 EPB rear caliper on a 380mm rear rotor to add thermal capacity, reduce iron-rotor dust, and cut rotating mass where the car is most sensitive to steering feel. Brackets, rotor-hat offsets, lines, and mounting hardware are engineered for the customer's confirmed Zeekr X trim rather than assumed from the shared platform.
- 390mm front carbon-ceramic rotors require 20-inch or larger wheels on the Zeekr X; wheels under 20 inches will not clear the rotor, and spoke clearance must still be checked against the GT350 Brembo caliper body.
- The front axle uses the exact Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper specified for this kit, matched to StopFlex hats and brackets for the confirmed Zeekr X trim.
- The rear axle uses a TTSPORT EP4 4-Piston Caliper with EPB on a 380mm rotor so the Zeekr X keeps electronic parking brake function while adding rear thermal capacity.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Zeekr X |
| Model years | 2024-2026+ |
| Front setup | Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper / 390mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 20" (for the 390 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 390 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 Ford Shelby GT350 Mustang 6-Piston Caliper, giving the Zeekr X a six-piston fixed-caliper layout for more even pad loading and firmer pedal response than a smaller sliding-caliper street setup. Its value is that it is a genuine OEM-derived Brembo performance caliper from the GT350 application, not an unproven generic casting. StopFlex adapts it to the Zeekr X with trim-specific brackets, rotor-hat offsets, pads, lines, and hardware around the 390mm carbon-ceramic rotor.
Rear Caliper (Balance)
The rear uses the TTSPORT EP4 4-Piston Caliper with EPB, adding rear-axle braking capacity while retaining the Zeekr X's factory electronic parking brake behavior. Its four hydraulic service pistons support braking stability, while the dedicated EPB actuator preserves parking-brake convenience.
Front & rear, engineered together: This kit is engineered as a front-and-rear system so the 390mm front GT350 Brembo package is not paired with an undersized rear axle. The TTSPORT EP4 architecture uses four hydraulic service pistons plus a dedicated EPB actuator piston, allowing StopFlex to tune rear thermal capacity and parking-brake function together with the front carbon-ceramic conversion.
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 GT350 Mustang 6-Piston Caliper |
| Front CCB rotors | 390mm |
| 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. |
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 Zeekr X kit fit my exact trim and wheels?
StopFlex does not assume platform-wide fitment. The kit is built after confirming your exact 2024-2026+ Zeekr X trim, wheel diameter, wheel offset, hub geometry, and spoke clearance; the 390mm front rotor requires 20-inch or larger wheels.
Will the electronic parking brake still work?
Yes, this kit is configured with the TTSPORT EP4 4-Piston Caliper with EPB at the rear. The caliper uses hydraulic service pistons for braking and a dedicated actuator for the electronic parking brake, so the Zeekr X keeps EPB function.
Why use carbon-ceramic rotors on a Zeekr X?
A Zeekr X can generate high brake energy because it combines EV mass with strong acceleration. Carbon-ceramic rotors add heat capacity and fade resistance while reducing brake dust and rotating mass compared with iron rotors of similar size.
What must I confirm before ordering?
Confirm model year, trim, drive configuration, current brake package, wheel diameter, wheel offset, and spoke clearance. StopFlex uses those details to set the correct Zeekr X brackets, rotor-hat offsets, brake lines, and caliper mounting hardware.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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