2023-2026+ Mercedes-AMG GLC63S / GLC43 (X254/C254) Carbon Ceramic Brake Kit
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
2023-2026+ Mercedes-AMG GLC63S / GLC43 (X254/C254) Carbon Ceramic Brake Kit — OEM-Size Replacement
This StopFlex OEM-size carbon-ceramic replacement kit is for 2023-2026+ Mercedes-AMG GLC43 and GLC63S X254/C254 owners replacing heavy iron rotors, overheated track-day brakes, or costly factory carbon-ceramic service parts. The GLC63S setup uses 390mm front and 370mm rear references; the GLC43 setup uses 370mm front and 360mm rear references, so the kit is built around the correct AMG rotor envelope rather than a universal disc. Carbon-ceramic rotors reduce brake dust and unsprung mass while keeping the factory-style hat, floating hardware, pad set, and OEM-size fitment strategy.
- GLC63S X254/C254 fitment is based on the 390mm front and 370mm rear AMG rotor references used on the high-output plug-in hybrid model.
- GLC43 X254/C254 fitment is based on the 370mm front and 360mm rear AMG rotor references, not the larger GLC63S rotor package.
- The kit includes carbon-ceramic rotors, matched pads, hats, and floating hardware so the service parts match the factory-style AMG brake architecture.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-AMG GLC63S / GLC43 (X254/C254) |
| Model years | 2023-2026+ |
| Front rotor reference | GLC63S: 390mm; GLC43: 370mm |
| Rear rotor reference | GLC63S: 370mm; GLC43: 360mm |
| Page type | OEM-size carbon ceramic replacement |
| Minimum wheel size | 20" (for the 390 mm rotor) |
For OEM replacement orders, StopFlex builds around the factory rotor specification shown for this vehicle. Front floating-caliper setups require manual review before production. If the car uses aftermarket calipers such as Brembo, AP Racing, Alcon, or Wilwood, the order can still be built, but the exact caliper model, pad shape, and rotor dimensions must be confirmed before production.
This setup uses a 390 mm 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.
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.
Custom Rotor Hat Color
Every StopFlex OEM replacement order can be built with a custom rotor hat color, giving the carbon ceramic rotor package a cleaner match with the wheel, body color, and overall build style.
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 |
|---|---|
| CCB rotors | Full-car set by default |
| CCB brake pads | Matched for StopFlex carbon ceramic rotors |
| 7075 aluminum floating rotor hats | Vehicle-specific fitment |
| Stainless floating hardware | Full-car hardware set |
| Rotor hat color | Custom rotor hat colors are available for every OEM replacement order. |
| Order scope | Default listing is full-car set. Front-only or rear-only orders can be arranged after confirmation. |
FAQ
Will this kit fit both the AMG GLC43 and GLC63S?
Yes, only when the vehicle is a 2023-2026+ Mercedes-AMG GLC43 or GLC63S on the X254/C254 platform and the measured rotor sizes match this page. GLC43 applications use 370mm front and 360mm rear references; GLC63S applications use 390mm front and 370mm rear references.
Does the rear electric parking brake still work?
The kit is designed as an OEM-size rear brake replacement for the listed X254/C254 AMG GLC applications, so it retains the factory rear brake layout used with the vehicle’s EPB system. The installer should place the Mercedes EPB in service mode before rear pad or rotor work.
Why switch from the factory iron brakes on a GLC43 or GLC63S?
Carbon-ceramic rotors reduce rotor mass and visible brake dust compared with iron rotors, which matters on the AMG GLC’s large open-wheel designs. They also tolerate repeated heat cycles better when the SUV is driven hard on mountain roads or track days.
What should I confirm before ordering?
Confirm the exact trim, X254 SUV or C254 Coupe body code, front and rear rotor diameters, wheel clearance, and whether the car has the GLC43 370/360mm package or the GLC63S 390/370mm package. If the measured rotor size does not match this page, do not order this kit.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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