2022-2026+ Mercedes-AMG SL63 / SL55 / SL43 (R232) Carbon Ceramic Brake Rotors
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?
Direct Replacement CCB Discs (Retain Factory Calipers) for the 2022-2026+ Mercedes-AMG SL63 / SL55 / SL43 (R232). Factory rotor specifications and the smallest wheel that clears each trim:
| Trim | Front Rotor (Factory) | Rear Rotor (Factory) | Min. Wheel Size |
|---|---|---|---|
| SL63/SL55 | 390mm, 402mm (CCB) | 21" | |
| SL43 | 390mm | 20" | |
| SL63/SL55/SL43 | 360mm | 19" |
Keep Your Factory Calipers?
The rule is simple: front factory calipers must be 4-piston or more; the rear has no limit. A 1- or 2-piston floating front setup cannot take direct-replacement discs — that car needs the Full Upgrade kit with calipers. We build to the factory rotor specs above. Aftermarket calipers (Brembo, AP Racing, Alcon, Wilwood) work too — send the caliper model, pad shape, and rotor size for confirmation first.
Spoke profile and offset also affect clearance — confirm your exact wheels before ordering.
What's in the Box
| Item | Details |
|---|---|
| Product type | Direct Replacement CCB Discs (Retain Factory Calipers) |
| CCB rotors | Full-car set by default, built to the factory rotor specification |
| CCB brake pads | Matched ceramic-compatible compound for StopFlex carbon ceramic rotors |
| 7075 aluminum floating rotor hats | Vehicle-specific fitment; custom rotor hat colors available for every Direct Replacement order. |
| Stainless floating hardware | Full-car hardware set |
| Order scope | Default listing is full-car set. Front-only or rear-only orders can be arranged after confirmation. |
Why Carbon Ceramic — and Why StopFlex
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.
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.
Winter & Cold-Weather Braking
Cold facts first: an untuned ceramic disc bites less than iron on a freezing morning — physics, not a defect. StopFlex tuned both the pad compound and the disc's ceramic coating for cold starts, so winter cold-car braking now feels very close to summer. Leave extra margin on the very coldest first stops; severe-climate daily drivers should build Street Spec.
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
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat still soaks 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.
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
Will these fit my exact R232 trim without changing calipers?
These are direct-replacement carbon-ceramic rotors that reuse your factory calipers, valid only for the trims and sizes on this page. SL63 and SL55 use a 390mm or 402mm CCB front rotor; SL43 uses a 390mm front rotor; all three share a 360mm rear. Confirm which front size your car left the factory with before ordering, since the 390mm and 402mm setups are not interchangeable. Direct replacement requires a factory front caliper with 4 or more pistons, which the R232 AMG front setup satisfies.
How do these behave in winter and on a cold first start?
Any cold carbon-ceramic disc bites a little less than cold iron on the first stop or two. That is basic physics, not a fault. We tuned both the pad compound and the disc's ceramic coating for cold starts, so cold-car braking feel on the R232 now comes very close to warm summer feel. On the coldest mornings, leave a bit of extra following distance for the first few stops until the front 390mm or 402mm rotors reach normal operating temperature.
Can I replace only the fronts, or worn rotors from one axle?
Yes. Because this kit retains your factory calipers, you can refresh the fronts (390mm or 402mm on SL63/SL55, 390mm on SL43) or the 360mm rears independently. Many owners come here after chipping or wearing one axle's original CCB rotors and want an OEM-size replacement rather than a full new brake package. Match the exact size to what is currently on the car.
What pads come with the kit, and do they work with the electronic parking brake?
The kit ships with a carbon-ceramic-specific low-metallic resin-composite pad using steel, copper, and aramid fiber, with an average coefficient of friction near 0.44 and heat resistance to about 750 °C with strong anti-fade behavior. The R232 uses an electronically actuated parking brake integrated into the rear caliper, which you keep, so the parking function works exactly as it did from the factory.
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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