2018-2019 Porsche 911 (991) GT2 RS Carbon Ceramic Brake Rotors — Direct Replacement
Official Warranty: We offer a 1-year free replacement for quality defects or coating issues under normal (non-track) use. Please note that provided specs apply strictly to brake hats and brackets; wheel fitment data is for general reference only. Wheel clearance issues are excluded from warranty coverage and data accuracy claims. If additional clearance is needed, wheel spacers must be added at the customer's discretion.
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Will This Fit My Car?
Direct Replacement CCB Discs (Retain Factory Calipers) for the 2018-2019 Porsche 911 (991) GT2 RS. Factory rotor specifications and the smallest wheel that clears each trim:
| Trim | Front Rotor (Factory) | Rear Rotor (Factory) | Min. Wheel Size |
|---|---|---|---|
| GT2 RS | 410mm (PCCB) | 390mm (PCCB) | 21" |
Keep Your Factory Calipers?
Keep the factory calipers when the front axle uses fixed 4-piston-or-larger calipers; the rear axle has no piston-count restriction. Front 1- or 2-piston floating calipers require a Full Upgrade kit. Aftermarket-caliper applications are not assumed to fit: StopFlex reviews the caliper model, pad shape, rotor dimensions and offset before approving the build.
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 |
| Rotor construction | Short-Fiber Street Spec (lower price, street-only) or Long-Fiber Street / Track-Day / Motorsport Spec — chosen at order confirmation |
| Brake pad wear sensors | Included; specified for compatibility with the factory wear-sensor system, subject to final vehicle confirmation. |
| 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
Low Visible Dust
Matched StopFlex pads are selected for low visible dust on the ceramic friction surface. Actual wheel dust still varies with pad choice, traffic, temperature, bedding and driving intensity.
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.
Short-Fiber or Long-Fiber — Your Call
Every StopFlex disc is true carbon-ceramic. Short-Fiber Street Spec uses a simpler chopped-fiber process for a lower price and street-only duty; the Long-Fiber line uses continuous carbon strands that carry load across the whole rotor for higher strength and thermal durability — the pick for track and race heat.
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 like-size carbon-ceramic rotor can be materially lighter than an iron disc; the exact saving depends on rotor dimensions. Lower rotating, unsprung mass can reduce the load the suspension has to control.
High-Temperature Stability
The carbon-silicon-carbide friction material is selected for high-temperature stability and fade resistance. Overall pedal feel still depends on pad condition, fluid, caliper stiffness, cooling and operating temperature.
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, carbon-ceramic friction surfaces are designed for low wear. Actual service life depends on mileage, contamination, pad choice, heat cycles and driving use.
Winter & Cold-Weather Braking
On a freezing start, carbon-ceramic friction can feel different from warm operation. StopFlex pairs the disc coating with its matched street pad to improve cold response; it is still prudent to leave extra margin for the first stops in severe cold. Use a Street Spec for harsh-winter daily service.
Choose Your Rotor: Short-Fiber Street to Long-Fiber Motorsport
Four specs, one rule of thumb: all are real carbon-ceramic discs. Short-Fiber Street Spec is the lower-cost route for street-only driving. The three Long-Fiber specs use continuous carbon strands for higher strength and heat durability, and are the only choice for track-day or motorsport use.
Short-Fiber Street Spec
Chopped short-fiber carbon-ceramic body, ceramic coating, cross-drilled face.
Choose this for street-only use when purchase price matters most. It keeps the carbon-ceramic friction surface and coated finish, but it is not specified for track sessions.
Long-Fiber Street Spec
Continuous long-fiber body, ceramic coating, cross-drilled face, large cooling channels.
Choose this for daily and fast-road use when you want the long-fiber construction without moving to a track-focused face and cooling specification.
Long-Fiber Track-Day Spec
Continuous long-fiber body, ceramic coating, blank face, honeycomb cooling channels.
Choose this for repeated fast-road or track-day braking where thermal duty matters more than the drilled street appearance. High-temperature fluid and appropriate cooling still matter.
Long-Fiber Motorsport Spec
Continuous long-fiber body, uncoated blank face, honeycomb cooling channels.
Choose this for competition-focused use with the corresponding pad, fluid, cooling and warm-up strategy. It is not the default recommendation for a street-driven car.
Heat Management Note
Ceramic discs shrug off surface temperatures that would destroy iron, but the rest of the system still heats up: pads, fluid, seals, calipers, and wheels all absorb soak heat during repeated hard stops. For track days, long descents, and sustained hard driving, run brake cooling and high-temperature fluid.
Get Your Fitment Confirmed
Send the exact year, model, trim, current rotor sizes, caliper type, and wheel details before ordering. StopFlex confirms the supplied configuration before production and requests VIN/build data when needed.
FAQ
Does this direct-replacement set fit every 2018-2019 Porsche 911 (991) GT2 RS?
This listing is limited to the 2018-2019 Porsche 911 (991) GT2 RS with the supplied PCCB rotor references: 410 mm front and 390 mm rear. It retains the factory calipers. The front factory calipers must be fixed four-piston or larger; the rear axle has no caliper restriction under this listing.
What is included when replacing the GT2 RS PCCB discs?
The set includes StopFlex carbon-ceramic rotors, matched pads, vehicle-specific rotor hats, and floating hardware for the 410 mm front and 390 mm rear configuration. Brake-pad wear sensors are also specified as compatible with the OEM wear-sensor system. Factory calipers remain in place.
Which rotor specification should I choose for a GT2 RS used on the street or track?
Choose Short-Fiber Street Spec only for street use and lower cost. Long-Fiber Street is the step up for road use with greater duty requirements. For regular track days, choose Long-Fiber Track-Day; Motorsport is for the highest heat and duty requirement. Select based on how the GT2 RS is actually used, not just its factory rotor size.
How do these carbon-ceramic discs behave in cold winter conditions?
An untuned cold carbon-ceramic disc can have less initial bite than cold iron. StopFlex specifies a matched pad compound and disc coating to reduce that cold-start gap on this GT2 RS configuration. The coldest first stops still deserve extra margin; identical summer and winter response is not promised.
More Contact Information
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