Porsche 911 (991) Turbo / S Brembo OEM Porsche 911 GT3 6-Piston Caliper with 410mm CCB carbon ceramic brake rotor
Brembo OEM Porsche 911 GT3 6-Piston Caliper 410mm CCB carbon ceramic front brake kit for Porsche 911 (991) Turbo / S
Porsche 911 (991) Turbo / S 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) Turbo / S

2014-2019 Porsche 911 (991) Turbo Carbon Ceramic Big Brake Kit — Brembo Porsche 911 GT3 6-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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StopFlex worldwide shipping carriers including DHL, FedEx, UPS, DPD, GLS, and SF Express.
About the Disc

Will This Fit My Car?

Full Upgrade CCB Big Brake Kits (With Calipers) for the 2014-2019 Porsche 911 (991) Turbo. This page's exact brake setup:

Model Years Front Setup Rear Setup Min. Wheel Size
2014-2019 Brembo OEM Porsche 911 GT3 6-Piston Caliper / 410mm Brembo OEM Porsche 911 GT3 4-Piston Caliper / 390mm 21"

This kit is built per car, not per platform. We engineer the brackets, rotor-hat offsets, and caliper mounting to your confirmed model and trim, because trims sharing a chassis name frequently differ underneath — performance variants can run different knuckles, hub geometry, and wheel ET clearance than their standard siblings. You receive calipers, pads, rotor hats, floating hardware, and brake lines as one matched, trim-specific system. Cars with modified knuckles, uprights, or non-factory suspension mounting points need review before ordering.

The 410 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 GT3 6-Piston Caliper
OE / Part No.: L 9GT-615-123A · R 9GT-615-124A
Front CCB rotors 410mm
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

Every StopFlex kit order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors — the brake package matches your exact build, not a fixed off-the-shelf look.

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

Why Carbon Ceramic — and Why StopFlex

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.

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.

Winter & Cold-Weather Braking

Cold facts first: an untuned ceramic disc bites less than iron on a freezing morning — physics, not a defect. StopFlex tuned both the pad compound and the disc's ceramic coating for cold starts, so winter cold-car braking now feels very close to summer. Leave extra margin on the very coldest first stops; severe-climate daily drivers should build Street Spec.

Caliper Overview

Front Caliper

The front runs the Brembo OEM Porsche 911 GT3 6-Piston Caliper, the same monobloc unit Porsche fits to the GT3, clamping a 410mm carbon-ceramic disc for firm, repeatable pedal feel through heavy braking.

Rear Caliper

The rear pairs the Brembo OEM Porsche 911 GT3 4-Piston Caliper with a 390mm carbon-ceramic disc, adding rear thermal capacity so the whole car sheds heat evenly on track and canyon runs.

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

High rotor temperature tolerance does not mean heat management disappears. Under repeated hard braking, heat migrates into the pads, brake fluid, seals, calipers, and wheels even when the ceramic disc itself is comfortable. Plan brake cooling and high-temperature fluid for extended track sessions, long mountain descents, or sustained aggressive driving.

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

Why does the dealer quote so much less useful than this kit?

A factory PCCB rotor replacement on a 991 Turbo is one of the most expensive brake jobs in the Porsche lineup, and it only returns you to stock. This kit replaces worn PCCB or upgrades steel brakes with GT3 6-piston fronts on 410mm carbon-ceramic discs and GT3 4-piston rears on 390mm discs, so you get more caliper and rotor for money spent, not just a like-for-like refresh.

Will this really fit my exact 991 Turbo?

Yes, but we build it to your confirmed trim, not the 991 platform in general. Turbo and Turbo S share the chassis name yet can differ in upright geometry, hub offset, and wheel ET clearance, so we cut the brackets and set the rotor-hat offsets specifically for your car. We do not make a universal bolt-on claim; we confirm your VIN and trim first.

How do carbon-ceramic brakes behave in cold winter driving?

A cold carbon-ceramic disc naturally bites a little less than cold iron on the first stops. That is physics, not a fault. We tune both the low-metallic pad compound and the disc's ceramic coating for cold starts, so winter cold-car feel now comes very close to summer feel. On the coldest first stop of the day, leave a bit of extra following distance until the system is up to temperature.

Will my dashboard pad-wear warning still work?

Yes. This kit includes brake pad wear sensors that are fully compatible with your Porsche's OEM wear-sensor system, so the factory pad-wear warning keeps functioning with no dashboard errors or warning lights.

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