2020-2026+ Mercedes-Benz CLA-Class / AMG (C118/X118) 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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2020-2026+ Mercedes-Benz CLA180 / CLA200 / CLA250 / CLA35 / CLA45 / CLA45 S (C118/X118) CCB Big Brake Kit — Genuine Brembo GT6 Front + Genuine Brembo GT4 Rear Setup
This StopFlex kit is for C118/X118 CLA owners who have outgrown the factory iron brake package through repeated high-speed stops, track sessions, heavy brake dust, or wheel-clearance-driven appearance goals. The front upgrade uses 380 mm carbon-ceramic rotors with Brembo V6 / GT6 / GTS6 6-Piston Caliper Options, while the rear uses 380 mm carbon-ceramic rotors with Brembo V4 / GT4 / GTS4 4-Piston Caliper Options. Each kit is built for the customer’s exact CLA180, CLA200, CLA250, CLA35, CLA45, or CLA45 S configuration, because AMG performance trims and standard trims can differ in upright geometry, hub offset, and wheel ET clearance.
- 380 mm front and 380 mm rear carbon-ceramic rotors require 19 inch or larger wheels on the CLA C118/X118; spoke clearance is verified separately from wheel diameter.
- Front choices are V6, GT6, or GTS6 6-piston Brembo calipers, each paired with a 380 mm rotor for this CLA kit.
- CLA180, CLA200, CLA250, CLA35, CLA45, and CLA45 S fitments are engineered by exact trim, not assumed from the shared C118/X118 chassis code.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-Benz CLA180 / CLA200 / CLA250 / CLA35 / CLA45 / CLA45 S (C118/X118) |
| Model years | 2020-2026+ |
| Front setup | Brembo V6 / GT6 / GTS6 6-Piston Caliper Options / 380mm |
| Rear setup | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options / 380mm |
| 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 CLA a six-piston fixed-caliper layout for more even pad loading and firmer pedal response than a smaller sliding-caliper arrangement. The buyer chooses V6 = Genuine Brembo OEM Cadillac CTS-V 6-Piston Caliper with 380 mm rotor, GT6 = Genuine Brembo GT | M6 6-Piston Caliper with 380 mm rotor, or GTS6 = Genuine Brembo GT | S6 6-Piston Caliper with 380 mm rotor. All front options use genuine Brembo calipers matched to StopFlex carbon-ceramic rotors, hats, pads, brackets, lines, and hardware for the confirmed CLA trim.
Rear Caliper (Balance)
The rear axle uses Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on 380 mm carbon-ceramic rotors to support rear brake contribution without making the car front-heavy under braking. Rear fitment is engineered around the CLA’s factory electronic parking brake requirements so parking-brake and hold-function integration can be addressed during the build specification.
Front & rear, engineered together: The 380 mm front and 380 mm rear package is specified as a complete system so piston area, rotor diameter, pad shape, hat offset, and bracket geometry are matched together. This avoids the common front-only problem of increased front torque with factory rear heat capacity and bias left unchanged.
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 | 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 | 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 — 380 mm rotor GT4 = Genuine Brembo GT | M4 4-Piston Caliper — 380 mm rotor GTS4 = Genuine Brembo GT | S4 4-Piston Caliper — 380 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 CLA180, CLA200, CLA250, CLA35, CLA45, or CLA45 S?
Fitment is confirmed per exact trim before production. StopFlex does not assume that every C118/X118 shares the same knuckle, hub position, rotor-hat offset, or wheel clearance; the brackets and hats are built around your confirmed CLA configuration.
What wheel size do I need for the 380 mm carbon-ceramic rotors?
This kit requires 19 inch or larger wheels because the largest rotor is 380 mm. Wheel diameter is only the first check; StopFlex also confirms spoke clearance for the Brembo 6-piston front caliper and 4-piston rear caliper package.
Will the electronic parking brake still work?
The C118/X118 CLA uses an electric parking brake, so rear-kit specification must account for EPB function. StopFlex confirms the rear caliper option and parking-brake integration before the kit is built for your car.
Why switch this CLA from iron brakes to carbon-ceramic?
Carbon-ceramic rotors are chosen for repeated heat cycles, reduced brake dust, lower rotating mass, and a cleaner open-wheel appearance. On CLA35, CLA45, and CLA45 S use cases, the 380 mm Brembo front setup also gives more thermal margin for aggressive road and track braking than a smaller factory iron package.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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