The build on this GT63 S
| Item | STOPFLEX build on GT63 S (X290) |
|---|---|
| Vehicle | Mercedes-AMG GT63 S, X290 chassis |
| Front setup | Factory AMG 6-piston caliper with 420 mm STOPFLEX carbon ceramic rotor |
| Rear setup | Factory rear caliper with 360 mm STOPFLEX carbon ceramic rotor |
| Pads | STOPFLEX carbon-ceramic-matched pad compound |
| Wheel shown | 21-inch AMG forged wheel |
| Rotor construction | STOPFLEX long-fiber CCB, about half the weight of same-size steel rotors |
| Upgrade scope | Front and rear rotor and pad upgrade on factory AMG calipers |
Confirm before you order
This is a rotor and pad upgrade that keeps your factory AMG calipers. Check the exact brake hardware on your car and your wheel clearance first. The 21-inch factory AMG forged wheel clears this build, but aftermarket wheel barrel shape should never be assumed.
What carbon ceramic actually changes
| STOPFLEX feature | Why it matters on the GT63 S | What you notice |
|---|---|---|
| Carbon ceramic rotor, ~half the weight of steel | This is a heavy, high-power AMG, so the front rotors carry real mass right where you least want it | Lighter steering off-center and a front end that settles faster over rough pavement |
| High-heat friction stability (around 0.3μ at 900°C) | Big speed plus big weight means repeated stops dump a lot of heat into the discs | The pedal stays firm deeper into a run instead of going long when the brakes get hot |
| STOPFLEX pads, very low dust | Large AMG forged wheels show every bit of iron dust | Wheels stay clean far longer between washes |
| Rotor faces don't rust | A daily-able GT63 S sees rain and sits between drives | No orange staining on the discs behind open wheel spokes |
| Long-fiber CCB construction and ceramic-coated finish | Coming off iron, you want durability under repeated heat, not a fragile show part | Strong, long-wearing rotors with a crackle-texture finish that looks the part behind the spokes |
What gets better
- Stronger fade resistance on repeated hard stops from speed
- Lower unsprung mass at the front for cleaner suspension response
- Very low brake dust and no rust on the rotor faces
- Long street life, roughly 250,000 to 300,000 km when the car isn't tracked
- Premium exposed-rotor look behind the factory 21-inch AMG wheels
What to confirm first
- Your exact vehicle: Mercedes-AMG GT63 S, X290 chassis
- The factory brake hardware currently on the car
- Wheel clearance, especially if you run aftermarket wheels
- That the rotor and pad are ordered as a matched package
- A proper bedding procedure at install for quiet, even street behavior
If you're not sure your car matches the spec shown here, send us your details and we'll confirm GT63 S (X290) fitment before you order through our Mercedes-Benz CCB collection.
Build gallery
FAQ
Does this work with my factory AMG calipers, or do I need new calipers?
This is a rotor and pad upgrade built around the factory AMG calipers on the GT63 S, so there is no full caliper conversion. The front uses a 420 mm STOPFLEX carbon ceramic rotor under the factory 6-piston front caliper, with a 360 mm rotor at the rear. Confirm your car's exact brake hardware before ordering.
Will carbon ceramic brakes be noisy or grabby for daily driving?
Not when the rotor and pad are matched correctly. With STOPFLEX pads, cold braking stays normal, dust stays very low, and street behavior is civilized. A proper bedding procedure still matters to get even pad transfer.
Do the factory 21-inch AMG forged wheels clear this setup?
The build shown here runs the factory 21-inch AMG forged wheel. Wheel barrel shape still drives clearance, so if you run aftermarket wheels you should confirm fitment before ordering.
How long do STOPFLEX carbon ceramic rotors last on a street car?
On a street-driven GT63 S that never sees a track, STOPFLEX rotor life can reach roughly 250,000 to 300,000 km. Real mileage depends on pad choice, driving style, and how much heat you put through them.
What will I actually feel after the swap?
Better fade resistance on repeated hard stops, far less brake dust on the wheels, and a lighter feel at the front because the carbon ceramic rotors weigh about half what same-size steel rotors do. On a heavy, high-power car like the GT63 S, that drop in unsprung mass also helps the front end settle more cleanly.
