StopFlex Carbon Ceramic Brake Disc Kit (Racing-Only)
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
StopFlex Race-Only Carbon Ceramic Brake Disc Kit (C/SiC)
Built for dedicated track / time-attack cars chasing repeatable braking at race temperatures. This is the raw-surface (no cosmetic topcoat) carbon-ceramic disc package—made-to-order in your exact sizes—paired with StopFlex CNC-machined Aluminum Hats and a StopFlex CCB-optimized Pad Set (Match Your Calipers).
What changes for you (on-track):
- Less rotating mass: carbon-ceramic systems are commonly about ~50% lighter than comparable steel/iron discs, helping the tire stay planted over curbs, bumps, and braking zones.
- Repeatability in heat: the race-only surface is designed around sustained high-energy stops—less “it was great for 3 laps then fell off.”
- Stable pedal under abuse: less thermal distortion at the disc face helps you keep a consistent pedal when your session is long and fast.
- Race reality (honest): this is not a “clean wheels” product. Expect more noise, more dust (pad-dependent), and the need for regular inspections.
Fitment confirmation (we keep it simple):
- Year / Make / Model / Wheel Size (VIN helps)
We build the disc size (330–440 mm), hat geometry, and pad spec around your wheels and current brake setup so the kit installs cleanly and clears the barrel/spokes. For race builds, we also check pad sweep, thermal margin, and whether your cooling plan is realistic.
Important: Race-only discs are not intended for street use. If you drive to the track, ask us for a Track-Day spec instead.
Bolt-On Package List
| Item | What it is | Why it matters |
|---|---|---|
| StopFlex Carbon Ceramic Discs (C/SiC) — Race-Only Variant | Raw friction surface (no cosmetic topcoat) built for sustained track temperatures and repeated high-energy stops. Hive-style internal cooling architecture. | Prioritizes repeatability and heat tolerance over cosmetics and street comfort. |
| StopFlex CNC-machined Aluminum Hats | Precision hats matched to your application. | Correct alignment and clearance with your hub/wheel package, with consistent pad sweep and reliable hardware fitment. |
| StopFlex CCB-optimized Pad Set (Match Your Calipers) | Pad compound selected for carbon-ceramic discs and matched to your caliper shape. | Pad chemistry matters more on CCB. Correct pairing helps stabilize the friction layer and avoids “wrong pad on CCB” issues (noise spikes, inconsistent bite, accelerated surface wear). |
Note: This page is for the disc kit. For a complete disc + caliper conversion (or if your current setup is a sliding caliper / small rotor platform), we can quote a full package separately.
Carbon-Ceramic vs. Cast-Iron / Steel Discs (Race Context)
| Item | StopFlex Carbon-Ceramic (C/SiC) — Race-Only | Cast-Iron / Steel Disc |
|---|---|---|
| Typical disc weight (same size class) | Often about ~50% lighter than steel/iron discs of similar size. | Heavier rotating mass at the wheel. |
| Service life (how race teams should think about it) | Measured in track hours / events, not road mileage. Plan routine inspections (surface condition + thickness) and replace when worn or damaged. | Also often treated as a consumable in hard track use. In normal road driving, rotors are commonly replaced in the 30,000–70,000 miles band (≈48,000–113,000 km), but track abuse can shorten that significantly. |
| Corrosion & appearance | No “flash rust” like iron. Race surfaces will show heat marks and normal track patina. | Surface rust after rain/storage is normal; cosmetic “orange” is common. |
| Brake dust | Depends heavily on pad choice. Race-oriented compounds can be dusty; choose pads for stability first, cleanliness second. | Also pad-dependent; many track pads are dusty by design. |
| High-temperature stability (material + failure modes) | Built for repeated high-energy stops with a structure that remains stable at elevated temperatures. Primary wrong-use risks: impact damage (chips from debris/curbs) and pad mismatch (unstable friction layer / accelerated wear). | Robust and forgiving for most street use. Under repeated heavy heat cycles, typical risks are hot spotting, thermal cracking, and heat soak into pads/fluid if cooling is insufficient. |
| Cooling needs (non-negotiable for long sessions) | Plan brake ducts/venting. Track sessions are usually limited by pads + fluid if airflow is poor—regardless of rotor material. | Cast iron conducts heat well and dumps it into airflow—until the system is overwhelmed. Ducting still matters when energy per stop is high. |
Bottom line: Race-only carbon-ceramic is for drivers who prioritize repeatability, reduced rotating mass, and high-temp stability—and accept inspections + pad discipline as part of the program. If you want street comfort and clean wheels, pick Street or Track-Day spec instead.
Choose Your Disc Style
Three variants built around the same long-fiber carbon-ceramic core. This page focuses on Race-Only—but we keep the options here so you don’t buy the wrong spec for your actual use.
Street
- Face design: Drilled + Big Cooling Holes
- Cooling core: Directional internal venting
- Coating: Ceramic coating (street durability + clean look)
- Use: Daily, canyon runs, highway pulls, short light track sessions
Tip: If you drive the car on public roads, this is usually the right answer.
Track-Day
- Face design: Blank + Hive Cooling Holes
- Cooling core: Hive-style internal cooling
- Coating: Ceramic coating (balanced street + heat tolerance)
- Use: Street + occasional track days (best with proper brake ducts)
Tip: Best “drive to track, drive home” option with real cooling.
Race-Only
- Face design: Blank + Hive Cooling Holes
- Cooling core: Hive-style internal cooling
- Coating: No coating (race-focused surface)
- Use: Dedicated track/race cars with strong cooling and regular inspections
Note: Not intended for street use.
Technical Specifications
| Disc material | StopFlex carbon-ceramic composite (C/SiC), race-only surface engineered for sustained high-energy stops and repeatability. |
| Disc diameter range | 330–440 mm (application-specific) |
| Construction | Two-piece disc system with StopFlex CNC-machined Aluminum Hats |
| Pad set | StopFlex CCB-optimized Pad Set (Match Your Calipers) |
| Compatibility | Designed to be matched to your existing calipers and wheel package through the fitment confirmation step. |
Race-only setups live or die by fitment + pad match + cooling + fluid. We’d rather quote it correctly than sell a generic spec that overheats your pads in 5 laps.
FAQ
Is this a universal kit?
No. The kit is made-to-order. We confirm your Year / Make / Model / Wheel Size (VIN helps) and build the hat geometry + disc size to clear your wheels and match your setup.
Is Race-Only street legal?
No. This spec is not intended for public-road use. If you drive the car on the street, choose Street or Track-Day spec instead.
Will it work “from cold”?
The rotor material is stable, but cold bite is mostly a pad question. Race-oriented pad compounds may trade low-temperature comfort for high-temperature stability. We’ll match the pad set to your calipers and your actual use so you’re not guessing.
How long do the discs last in race use?
Race use is not a mileage game. Think in track hours / events. Life depends on vehicle mass, tire grip, aero load, brake torque demand, pad choice, and cooling. Plan inspections each event and replace when worn or damaged.
Do I need cooling upgrades?
Yes—if you run long sessions. Without airflow, track braking is usually limited by pads and fluid before the rotor material “fails.” Ducts/venting and high-temp fluid are part of a real race setup.
Can I use any pad that fits my calipers?
Not recommended. Pad chemistry matters more on carbon-ceramic. A wrong pad can create unstable friction, noise, and unnecessary surface wear. Use the StopFlex CCB-optimized Pad Set specified for your calipers.
Is there a bed-in process?
Yes. A controlled bed-in builds a consistent friction layer. We provide a simple procedure with the kit (moderate stops, then cool-down—avoid long pedal holds while hot).
Real Customer Cases & Reviews
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