Porsche 911 (991) Carrera GTS Brembo OEM Porsche 911 Turbo S 10-Piston Caliper with 420mm CCB carbon ceramic brake rotor
Brembo OEM Porsche 911 Turbo S 10-Piston Caliper 420mm CCB carbon ceramic front brake kit for Porsche 911 (991) Carrera GTS
Porsche 911 (991) Carrera GTS Brembo OEM Porsche 911 GT3 4-Piston Caliper with 390mm CCB carbon ceramic rear brake rotor
Brembo OEM Porsche 911 GT3 4-Piston Caliper 390mm CCB carbon ceramic rear brake kit for Porsche 911 (991) Carrera GTS

2015-2019 Porsche 911 (991) Carrera GTS Carbon Ceramic Big Brake Kit — Brembo Porsche 911 Turbo S 10-Piston

Request a Custom Quote

To ensure 100% fitment accuracy, our brake kits are custom-configured for your specific vehicle. Please share your Year / Make / Model / Wheel Size / VIN with our specialists for a bespoke setup and pricing.

Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.

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About the Disc

Will This Fit My Car?

Full Upgrade CCB Big Brake Kits (With Calipers) for the 2015-2019 Porsche 911 (991) Carrera GTS. This page's exact brake setup:

Model Years Front Setup Rear Setup Min. Wheel Size
2015-2019 Brembo OEM Porsche 911 Turbo S 10-Piston Caliper / 420mm Brembo OEM Porsche 911 GT3 4-Piston Caliper / 390mm 21"

Every StopFlex kit is bespoke-engineered for your exact model and trim — brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, never assumed from the platform. Trims that share a chassis name can differ mechanically: a pure performance variant often carries different knuckles, hub geometry, and wheel ET clearance than the standard models, so parts that bolt onto one are not the parts that fit the other. Calipers, pads, rotor hats, floating hardware, and brake lines ship as one matched system built to your confirmed trim. Modified knuckles, uprights, or non-factory suspension mounting points must be reviewed before ordering.

The 420 mm rotor sets the minimum wheel size at 21" — smaller wheels will not clear the caliper and rotor. Spoke profile and offset also affect clearance; 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

What's in the Box

Item Details
Product type Full Upgrade CCB Big Brake Kits (With Calipers)
Front calipers Brembo OEM Porsche 911 Turbo S 10-Piston Caliper
OE / Part No.: L 992-615-123S · R 992-615-124S
Front CCB rotors 420mm
Rear calipers Brembo OEM Porsche 911 GT3 4-Piston Caliper
OE / Part No.: L 9GT-615-423A · R 9GT-615-424A
Rear CCB rotors 390mm
CCB brake pads Matched ceramic-compatible compound 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
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.

Make It Yours — Color & Logo Customization

Specify custom caliper colors, a custom caliper logo, and custom rotor hat colors on any kit order — the finished package matches your build instead of a standard catalog look.

  • Custom caliper color
  • Custom caliper logo
  • Custom rotor hat color

Why Carbon Ceramic — and Why StopFlex

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 carbon-ceramic rotor weighs roughly half of the equivalent iron disc. Less rotating, unsprung mass lets the suspension follow broken pavement more cleanly and makes steering response noticeably sharper.

High-Temperature Stability

The carbon-silicon-carbide friction matrix keeps working at temperatures that push iron rotors into heavy fade, so the tenth hard stop feels like the first — same pedal travel, same bite point.

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, one StopFlex CCB rotor set is engineered to outlast several sets of iron replacement rotors, recovering part of the up-front cost.

Low Visible Dust

Matched with StopFlex pads, the system sheds a fraction of the dust an iron rotor and pad combination throws. Wheels stay clean for weeks of driving instead of days.

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.

Continuous Fiber Construction

StopFlex discs are built with long continuous carbon fiber instead of chopped short fiber. Continuous strands carry load across the whole rotor body, raising strength and thermal durability under heat cycles.

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.

Winter & Cold-Weather Braking

Winter question, straight answer: untuned ceramic discs bite less when cold. StopFlex optimized the pad compound and the rotor's ceramic coating for cold operation, so cold-start braking in winter feels very close to warm-weather braking. Extra following distance on freezing first stops is still smart; severe-winter daily cars should run Street Spec.

Caliper Overview

Front Caliper

The front runs the Brembo OEM Porsche 911 Turbo S 10-piston caliper over a 420mm carbon-ceramic rotor, giving you consistent clamping force and a firm pedal even after repeated hard stops from triple-digit speeds.

Rear Caliper

The rear uses the Brembo OEM Porsche 911 GT3 4-piston caliper on a 390mm rotor, adding the thermal headroom the GTS needs for sustained braking without cooking the rear pads.

Choose Your Rotor: Street, Track-Day, or Motorsport

StopFlex Street Spec carbon ceramic brake rotor

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.

StopFlex Track-Day Spec carbon ceramic brake rotor

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.

StopFlex Motorsport Spec carbon ceramic brake rotor

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.

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 vehicle details, current rotor sizes, and caliper type before ordering. Every StopFlex order is confirmed against your VIN-level configuration before production.

FAQ

Will these rotors clear my wheels?

The 420mm front rotor requires a minimum 21-inch wheel; anything smaller will not clear the caliper, and spoke geometry matters too. Send us your exact wheel specs and offset before ordering so we confirm clearance for your setup rather than assuming it.

How does this kit behave in cold winter driving?

A cold carbon-ceramic disc naturally bites less than cold iron on the first stops — that's physics, not a fault. We've tuned both the low-metallic pad compound and the disc's ceramic coating for cold starts, so winter cold-car feel comes very close to summer feel. Still leave a little extra following distance on your first stops of a freezing morning.

Is this really made for the Carrera GTS specifically, or a generic 911 kit?

It's bespoke-engineered for your confirmed 991 Carrera GTS trim. Brackets, rotor-hat offsets, and caliper mounting are matched to your car's knuckles, hub geometry, and wheel clearance. We don't make a platform-wide bolt-on claim, because trims sharing the 991 name can differ mechanically.

Will my parking brake and pad-wear warning still work?

Yes. The GT3-derived rear calipers retain your factory electromechanical parking brake function, and the included wear sensors are fully compatible with the OEM system, so the dashboard pad-wear warning keeps working with no error lights.

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