2014-2019 Porsche 911 GT3 (991) CCB Big Brake Kit | Brembo OEM Porsche 911 Turbo S 10-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2014-2019 Porsche 911 (991) GT3 / RS / Touring CCB Big Brake Kit — Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper Front + Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper Rear Setup
The 2014-2019 Porsche 911 (991) GT3, GT3 RS, and Touring can consume iron rotors and pads quickly under track heat, while OEM carbon-ceramic replacement costs can make normal wear or cracking expensive. This StopFlex kit pairs a 420 mm front carbon-ceramic rotor with the Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper and a 390 mm rear carbon-ceramic rotor with the Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper for heat capacity, fade resistance, lower brake dust, and reduced rotating mass. Each kit is engineered to the confirmed 991 GT trim, wheel package, and hub geometry rather than treated as a generic 991 bolt-on.
- 420 mm front carbon-ceramic rotors require 21 inch or larger wheels on this 991 GT3 / RS / Touring application; wheels under 21 inches will not clear, and spoke clearance still must be checked.
- Front braking uses the Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper with a 420 mm rotor, giving the 991 GT chassis more thermal capacity than a smaller front-only conversion.
- The kit keeps the Porsche OEM pad-wear warning system functional with compatible wear sensors, so pad-wear monitoring remains active without dashboard errors.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Porsche 911 (991) GT3 / RS / Touring |
| Model years | 2014-2019 |
| Front setup | Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper / 420mm |
| Rear setup | Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper / 390mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 21" (for the 420 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 420 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 Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper, selected as the primary upgrade for increased pad control and a firmer, more consistent pedal under repeated high-speed stops. Because it is a genuine Brembo OEM-derived Porsche performance caliper, the casting, bridge stiffness, and service architecture are suited to heavy 911 braking loads rather than adapted from a generic aftermarket caliper. StopFlex engineers the caliper mounting and 420 mm rotor-hat offset around the customer’s confirmed 991 GT3, GT3 RS, or Touring configuration.
Rear Caliper (Balance)
The rear axle uses the Genuine Brembo OEM Porsche 911 GT3 4-Piston Caliper with a 390 mm carbon-ceramic rotor to support rear brake contribution without overloading the rear tires during trail braking. The rear package is engineered to retain the factory electronic parking brake architecture and Porsche pad-wear sensor function where equipped.
Front & rear, engineered together: A 420 mm 10-piston front setup changes torque capacity, heat distribution, and pedal response, so the 390 mm rear package is matched as part of the system rather than added as a cosmetic rear upgrade. StopFlex sizes the front and rear hardware together to preserve stable brake bias on the rear-engine 991 GT platform.
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 Turbo S 10-Piston Caliper |
| Front CCB rotors | 420mm |
| 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 991 GT3, GT3 RS, or Touring?
StopFlex does not assume one 991 fitment across all trims. Brackets, rotor-hat offsets, caliper mounting, brake lines, and hardware are matched to your confirmed model year, trim, wheel setup, and hub geometry before the kit is built.
What wheel size is required for the 420 mm front rotor?
The 420 mm front rotor requires 21 inch or larger wheels. Wheels under 21 inches will not clear the rotor, and 21 inch wheels still need spoke and offset clearance checked against the Genuine Brembo OEM Porsche 911 Turbo S 10-Piston Caliper.
Will the factory electronic parking brake and pad-wear warning still work?
Yes. This 991 Porsche application is built around the factory electronic parking brake system, and the included pad-wear sensor compatibility keeps the OEM pad-wear warning active without dashboard errors.
Why choose this over replacing OEM iron or OEM carbon-ceramic parts?
For a 991 GT3 / RS / Touring used on fast road or track, carbon-ceramic rotors reduce brake dust, rotating mass, and heat-related fade compared with iron consumables. For cars already on PCCB, this kit is a complete caliper, rotor, pad, hat, hardware, and line package that avoids relying on dealer-only carbon-ceramic replacement pricing.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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