2018-2019 Porsche 911 GT2 RS (991) CCB Big Brake Kit | Brembo OEM Porsche 911 GT3 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2018-2019 Porsche 911 (991) GT2 RS CCB Big Brake Kit — Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper Front + Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper Rear Setup
The 2018-2019 Porsche 911 (991) GT2 RS puts repeated high-speed braking loads into the front axle, where heat capacity, pedal consistency, and replacement cost drive most CCB upgrade decisions. This StopFlex kit pairs 410mm front carbon-ceramic rotors with the Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper, then matches the rear with 390mm carbon-ceramic rotors and the Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper for balanced torque and thermal capacity. Each kit is engineered to the confirmed GT2 RS configuration, including bracket geometry, rotor-hat offset, caliper mounting, brake lines, hardware, and wheel-clearance requirements.
- 410mm front rotors require 21-inch or larger wheels; wheels under 21 inches will not clear the front package, and spoke clearance must still be checked.
- Front braking is built around the exact Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper with 410mm carbon-ceramic rotors for GT2 RS track heat capacity and pedal consistency.
- The kit retains Porsche pad-wear sensor compatibility, so the factory pad-wear warning system continues to function without dashboard errors.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Porsche 911 (991) GT2 RS |
| Model years | 2018-2019 |
| Front setup | Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper / 410mm |
| Rear setup | Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper / 390mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 21" (for the 410 mm front rotor) |
Every StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.
This setup uses a 410 mm front rotor, so the minimum wheel size is 21". Wheels under 21" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
| Wheel Size (Standard) | Disc Range |
|---|---|
| 15" | 260 mm – 285 mm |
| 16" | 285 mm – 300 mm |
| 17" | 300 mm – 330 mm |
| 18" | 330 mm – 355 mm |
| 19" | 355 mm – 380 mm |
| 20" | 380 mm – 400 mm |
| 21" | 400 mm – 420 mm |
| 22" | 420 mm – 440 mm |
Caliper Overview — Front & Rear Balance
Front Caliper (Primary Upgrade)
The front axle uses the exact Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper, giving the 410mm rotor package a six-piston clamping layout for controlled pressure distribution across the pad. Its OEM Porsche GT3 provenance matters on a GT2 RS because the caliper architecture was developed for high-load 911 braking rather than adapted from a generic aftermarket casting. StopFlex mounts it with GT2 RS-specific brackets, rotor-hat offsets, lines, and hardware after confirming the customer’s exact car.
Rear Caliper (Balance)
The rear axle uses the Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper with a 390mm carbon-ceramic rotor to keep rear brake torque and thermal capacity in proportion with the 410mm front package. The rear system is engineered to retain the factory electronic parking brake function on this 991 GT2 RS configuration.
Front & rear, engineered together: The 410mm front and 390mm rear carbon-ceramic packages are specified together so brake torque, thermal capacity, pedal response, and stability remain matched front to rear. A front-only brake increase can shift the car toward excess front bias; this kit is engineered as a full system for the confirmed GT2 RS trim.
Make It Yours — Color & Logo Customization
Every StopFlex kit-upgrade order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the brake package matches your exact build instead of a fixed off-the-shelf look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why StopFlex CCB
Lower Unsprung Mass
StopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.
High-Temperature Stability
The carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.
Rust-Free Rotor Surface
Carbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.
Long Street-Service Potential
In normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.
Low Visible Dust
When paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.
Premium Ceramic-Glaze Appearance
StopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.
Street-Usable Cold Bite
Street Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.
Continuous Fiber Reinforcement
Long-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak 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.
Street / Track-Day / Motorsport Rotor Options
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.
Package Scope
| Item | Details |
|---|---|
| Front calipers | Genuine Brembo OEM Porsche 911 GT3 6-Piston Caliper |
| Front CCB rotors | 410mm |
| Rear calipers | Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper |
| Rear CCB rotors | 390mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| Brake pad wear sensors | Included; 100% compatible with the OEM wear-sensor system. |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| Color customization | Custom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order. |
| Order scope | Default listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation. |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
FAQ
Will this kit fit my exact 2018-2019 Porsche 911 GT2 RS?
Fitment is confirmed per vehicle, not assumed from the 991 chassis. StopFlex engineers the brackets, rotor-hat offsets, caliper mounting, lines, and hardware for the customer’s exact 2018-2019 GT2 RS configuration before production.
What wheel size is required for the 410mm front rotor package?
The 410mm front rotor requires 21-inch or larger wheels. Wheels under 21 inches will not clear the rotor package, and StopFlex also checks spoke clearance because caliper face clearance depends on wheel design and offset.
Will the factory electronic parking brake and pad-wear warning still work?
Yes. The rear package is engineered to retain the 991 GT2 RS electronic parking brake, and the pad wear sensors are 100% compatible with the Porsche OEM wear-sensor system so the factory warning logic continues to work without dashboard errors.
Why choose this carbon-ceramic kit instead of replacing the factory brakes at the dealer?
This kit gives the GT2 RS owner a complete caliper, rotor, pad, hat, hardware, and line package using 410mm front and 390mm rear carbon-ceramic rotors. The main reasons are higher heat capacity for repeated braking, lower brake dust than iron setups, reduced rotating mass, and a bespoke fitment path instead of a one-size platform claim.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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