2015-2023 Ford Mustang EcoBoost (S550) Carbon Ceramic Big Brake Kit — Brembo Shelby GT350 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
We Ship Worldwide
Real Customer Builds & Reviews
Will This Fit My Car?
Full Upgrade CCB Big Brake Kits (With Calipers) for the 2015-2023 Ford Mustang EcoBoost (S550). This page's exact brake setup:
| Model Years | Front Setup | Rear Setup | Min. Wheel Size |
|---|---|---|---|
| 2015-2023 | Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper / 380mm |
Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 mm rotor Option 2: Brembo GT | M4 4-Piston Caliper — 355 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355 mm rotor |
19" |
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 380 mm rotor sets the minimum wheel size at 19" — 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 Ford Shelby GT350 Mustang 6-Piston Caliper OE / Part No.: L FR3Z-2B121-G · R FR3Z-2B120-F |
| Front CCB rotors | 380mm |
| Rear calipers |
Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 mm rotor OE / Part No.: L 172-2523 · R 172-2524 Option 2: Brembo GT | M4 4-Piston Caliper — 355 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355 mm rotor |
| CCB brake pads | Matched ceramic-compatible compound for the supplied StopFlex carbon ceramic rotors |
| 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
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.
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.
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 Ford Shelby GT350 6-piston caliper, the same fixed-mount caliper Ford spec'd for the GT350's front axle. Six pistons over the 380mm rotor give you consistent clamping and a firm, repeatable pedal on the EcoBoost's lighter front end.
Rear Caliper
The rear is a Brembo 4-piston caliper on a 355mm rotor, offered in three options — V4 (Cadillac CTS-V), GT4 (Brembo GT M4), or GTS4 (Brembo GT S4). Pick the one that matches your rear thermal needs and finish; we set the bracket and hat offset to your confirmed trim.
Choose Your Rotor: Street, Track-Day, or Motorsport
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.
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
Will this fit my exact EcoBoost, or is it a generic S550 kit?
It's built for your confirmed trim, not the platform. The S550 family spans EcoBoost, GT, Performance Pack, Mach 1, and Shelby cars that differ in front knuckle geometry, hub offset, and wheel ET. We machine the brackets and set the rotor-hat offsets to your specific EcoBoost front end after you send us your details, so nothing is assumed from the chassis name alone.
What wheels do I need to clear this kit?
The front rotor is 380mm, so 19-inch wheels are the minimum. Wheels under 19 inches will not clear the front rotor, and spoke shape matters too — a barrel-clearing 19 with tight spokes can still contact the caliper. Send us your wheel specs and we'll confirm clearance against the GT350 6-piston front caliper before you buy.
How does this kit behave in cold weather?
A cold carbon-ceramic disc naturally bites less than cold iron on the first stops — that's physics, not a fault. We tune around it: the pad is a carbon-ceramic-specific low-metallic resin-composite with steel, copper, and aramid fiber, and the disc carries a ceramic coating optimized for cold starts. The result is cold-car feel that comes very close to summer feel. On the coldest first stops, still leave a little extra following distance.
Do I lose my parking brake with the rear kit?
No. The EcoBoost S550 uses a cable parking brake, and the 355mm rear setup is engineered to keep that cable function working with the Brembo 4-piston caliper you choose. We match the rear bracket and hat to your trim so the parking brake operates as it did from the factory.
More Contact Information
We’re here to help! Whether you need expert advice on brake setups, have questions about your order, or just want to share feedback, our team is ready to assist you. Reach out via your preferred channel below, or use the inquiry form.
Get in Touch
Business Hours
Monday – Saturday, 9:30 AM – 6:30 PM (GMT +8)
Current Time:
Follow Us
- Choosing a selection results in a full page refresh.