2014-2019 Mercedes-Benz GLA-Class / AMG (X156) Carbon Ceramic Big Brake Kit — Brembo AMG 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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Will This Fit My Car?
Full Upgrade CCB Big Brake Kits (With Calipers) for the 2014-2019 Mercedes-Benz GLA-Class / AMG (X156). This page's exact brake setup:
| Model Years | Front Setup | Rear Setup | Min. Wheel Size |
|---|---|---|---|
| 2014-2019 | OEM AMG 6-Piston Caliper / 390mm | TTSPORT EP4 4-Piston Forged Caliper integrated with EPB / 380mm | 20" |
Every StopFlex kit is bespoke-engineered for your exact model and trim — brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, never assumed from the platform. Trims that share a chassis name can differ mechanically: a pure performance variant often carries different knuckles, hub geometry, and wheel ET clearance than the standard models, so parts that bolt onto one are not the parts that fit the other. Calipers, pads, rotor hats, floating hardware, and brake lines ship as one matched system built to your confirmed trim. Modified knuckles, uprights, or non-factory suspension mounting points must be reviewed before ordering.
The 390 mm rotor sets the minimum wheel size at 20" — smaller wheels will not clear the caliper and rotor. Spoke profile and offset also affect clearance; 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 |
What's in the Box
| Item | Details |
|---|---|
| Product type | Full Upgrade CCB Big Brake Kits (With Calipers) |
| Front calipers | OEM AMG 6-Piston Caliper OE / Part No.: L 205-421-69-98 · R 205-421-70-98 |
| Front CCB rotors | 390mm |
| Rear calipers | TTSPORT EP4 4-Piston Forged Caliper integrated with EPB |
| Rear CCB rotors | 380mm |
| CCB brake pads | Matched ceramic-compatible compound for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| 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. |
Make It Yours — Color & Logo Customization
Any kit order can be personalized: custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the hardware behind your wheels matches the rest of the build.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why Carbon Ceramic — and Why StopFlex
Lower Unsprung Mass
A carbon-ceramic rotor weighs roughly half of the equivalent iron disc. Less rotating, unsprung mass lets the suspension follow broken pavement more cleanly and makes steering response noticeably sharper.
High-Temperature Stability
The carbon-silicon-carbide friction matrix keeps working at temperatures that push iron rotors into heavy fade, so the tenth hard stop feels like the first — same pedal travel, same bite point.
Rust-Free Rotor Surface
Ceramic discs cannot flash-rust. After rain, a wash, or weeks of parking, the rotor face behind your open-spoke wheels stays clean — no orange ring on a freshly detailed car.
Long Street-Service Life
In normal road use with matched pads and correct bedding, one StopFlex CCB rotor set is engineered to outlast several sets of iron replacement rotors, recovering part of the up-front cost.
Low Visible Dust
Matched with StopFlex pads, the system sheds a fraction of the dust an iron rotor and pad combination throws. Wheels stay clean for weeks of driving instead of days.
Premium Ceramic-Glaze Finish
StopFlex's proprietary coating gives the disc a bright ceramic-glaze surface with subtle texture — the factory carbon-ceramic look, clearly visible through open wheel designs.
Continuous Fiber Construction
StopFlex discs are built with long continuous carbon fiber instead of chopped short fiber. Continuous strands carry load across the whole rotor body, raising strength and thermal durability under heat cycles.
Bespoke Per-Vehicle Engineering
Every order is machined to the confirmed vehicle and trim. Brackets, hat offsets, and pad shapes are built for that exact car — never pulled from a one-size-fits-all catalog.
CCB-Specific Pad Compound
A low-metallic resin pad compound reinforced with steel, copper, and aramid fiber, made for ceramic discs: stable to about 750 °C, roughly 0.44 average friction, strong fade resistance, low rotor wear.
Winter & Cold-Weather Braking
Winter question, straight answer: untuned ceramic discs bite less when cold. StopFlex optimized the pad compound and the rotor's ceramic coating for cold operation, so cold-start braking in winter feels very close to warm-weather braking. Extra following distance on freezing first stops is still smart; severe-winter daily cars should run Street Spec.
Caliper Overview
Front Caliper
The front caliper is the OEM AMG 6-Piston Caliper paired with a 390 mm carbon-ceramic rotor. Six opposed pistons keep clamping load even across the pad face, so the pedal stays firm and consistent through repeated hard stops.
Rear Caliper
The rear uses the TTSPORT EP4 4-Piston Forged Caliper on a 380 mm rotor, with four 28 mm hydraulic service pistons plus a dedicated 27 mm EPB actuator piston that keeps your factory electronic parking brake working. The two-piece forged-aluminum body weighs about 4.50 kg per caliper without pads and adds real rear-axle thermal capacity behind the front 390 mm setup.
Choose Your Rotor: Street, Track-Day, or Motorsport
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.
Heat Management Note
High rotor temperature tolerance does not mean heat management disappears. Under repeated hard braking, heat migrates into the pads, brake fluid, seals, calipers, and wheels even when the ceramic disc itself is comfortable. Plan brake cooling and high-temperature fluid for extended track sessions, long mountain descents, or sustained aggressive driving.
Get Your Fitment Confirmed
Before ordering, tell us the exact vehicle, current rotor sizes, and caliper type. Nothing goes to production until the build is confirmed against your VIN-level configuration.
FAQ
How do cold carbon-ceramic brakes behave in winter on the GLA?
A cold carbon-ceramic disc naturally bites less than cold iron on the first stops of the day — that is physics, not a fault. We tune both the pad compound and the disc's ceramic coating specifically for cold starts, so first-thing-in-the-morning feel on your X156 comes very close to summer feel. On the coldest days, leave a little extra following distance for the first one or two stops until everything is up to temperature.
Will this fit my exact GLA trim — GLA200, GLA250, or GLA45 AMG?
Every kit is engineered to your confirmed trim. The GLA45 AMG uses different front knuckles and hub geometry than the GLA200 and GLA250, so brackets, rotor-hat offsets, and caliper mounting are cut for your specific car, not assumed from the X156 platform. We do not make a one-size-fits-all bolt-on claim — send us your VIN and trim and we build to it.
What wheel size do I need to clear the 390 mm front rotor?
The front rotor is 390 mm, so you need a minimum 20-inch wheel. Wheels under 20 inches will not clear the rotor. Spoke clearance also matters, so send us your wheel details and, in some cases, a small spacer may be advised to clear the caliper.
Does the kit keep the factory electronic parking brake?
Yes. The X156 GLA uses an electronic parking brake, and the TTSPORT EP4 rear caliper has a dedicated EPB actuator piston separate from its four hydraulic pistons. Your dash-switch parking brake works exactly as it did from the factory while you gain rear-axle thermal capacity.
More Contact Information
We’re here to help! Whether you need expert advice on brake setups, have questions about your order, or just want to share feedback, our team is ready to assist you. Reach out via your preferred channel below, or use the inquiry form.
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