The build: what's fitted to this GT3
| Item | Specification |
|---|---|
| Vehicle | Porsche 911 GT3 (992) |
| Front | Factory 6-piston caliper with 410mm STOPFLEX carbon ceramic rotor |
| Rear | Factory 4-piston caliper with 390mm STOPFLEX carbon ceramic rotor |
| Scope | Direct-fit rotor upgrade on the factory GT3 calipers |
| Quoted weight saving | About 18kg total versus steel |
| Construction | Continuous long-fiber carbon ceramic matrix |
| Caliper compatibility | Red steel-brake and yellow PCCB factory calipers |
Check this before you order
This is a rotor upgrade for the factory 992 GT3 calipers. It works with both the red steel-brake and yellow PCCB calipers, but it keeps the stock caliper layout rather than converting to a different brake setup. Confirm which calipers your car wears before ordering.
What carbon ceramic actually changes on a 992 GT3
| STOPFLEX feature | Why it matters on a 992 GT3 | What you notice |
|---|---|---|
| About 18kg off rotating mass | The GT3's front axle is already sharp, so weight at the corners changes how the car turns and rides more than weight anywhere else. | Quicker turn-in and a front end that settles faster over curbing and broken pavement. |
| Holds about 0.3μ at 900°C | Fast road runs and back-to-back track laps load the brakes with heat that fades steel systems. | A pedal that feels the same on lap five as it did on lap one. |
| Long-fiber carbon ceramic matrix | Continuous fiber gives a stronger structure than chopped fiber, and these rotors can often be resurfaced. | Durability you can live with, plus a service path instead of replace-only. |
| Low dust with STOPFLEX pads, no rust | A GT3 shows everything behind open wheels, and the rotors don't oxidize after rain. | Cleaner wheels between washes and no rusty disc faces after the car sits. |
| Direct-fit on factory calipers | You keep the GT3's stock brake architecture and pedal calibration instead of reengineering the system. | The car still drives like a GT3, just lighter and more heat-stable. |
What gets better
- Roughly 18kg less rotating and unsprung mass at the corners
- More consistent pedal under repeated hard braking and track heat
- Far less brake dust with STOPFLEX pads, and rotors that don't rust
- Long-fiber rotors that can often be resurfaced rather than scrapped
- Factory caliper layout and feel are left intact
What to confirm first
- Whether your car has red steel-brake or yellow PCCB calipers
- That the 410mm front / 390mm rear sizing matches your GT3
- Pad choice and inspection routine if the car sees regular track use
- Careful wheel-service handling to protect the rotor edges
If you're not sure which calipers your car wears or whether the sizing matches, send us your details and we'll confirm 992 GT3 fitment before you order through our Porsche CCB collection.
Build gallery
992 GT3 carbon ceramic brake FAQ
Will this fit my 992 GT3 if it came with steel brakes and red calipers?
Yes. The STOPFLEX rotors are built around the factory 992 GT3 calipers and fit both the red steel-brake calipers and the yellow PCCB calipers, so steel-brake owners and ceramic owners can both use the kit.
How much weight does this upgrade actually save?
This application is quoted at roughly 18kg total versus the steel setup. That weight comes off rotating and unsprung mass at the corners, which is the kind of weight you feel most in steering response and ride.
Will carbon ceramic brakes make my GT3 faster?
They don't add power. What they do is take rotating mass off each corner, which sharpens turn-in and lets the suspension follow the surface better. The car feels quicker to react, and the brakes stay more consistent over repeated hard stops.
Do carbon ceramic rotors need special care during wheel service?
They take braking heat and load extremely well, but the rotor edge doesn't like a sharp impact, so treat them carefully during wheel and tire work. Wheel guide pins are a smart precaution when the wheels come off.
Can STOPFLEX carbon ceramic rotors be resurfaced?
Yes, STOPFLEX long-fiber rotors can often be resurfaced rather than scrapped, which can stretch service life and lower long-term running cost compared with some replace-only ceramic discs.
