2015-2023 Ford Mustang EcoBoost (S550) CCB Big Brake Kit | Brembo GT500 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2015-2023 Ford Mustang EcoBoost / GT / Bullitt / Mach 1 / Shelby GT350 / GT350R / GT500 (S550) CCB Big Brake Kit — Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper Front + Genuine Brembo GT4 Rear Setup
S550 Mustang owners shop carbon-ceramic brakes when repeated high-speed stops, track sessions, or heavy street use expose iron-rotor heat soak, pad dust, and front-end mass. This StopFlex kit pairs the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper with 380 mm front carbon-ceramic rotors and matched 355 mm rear carbon-ceramic rotors using Brembo V4 / GT4 / GTS4 4-Piston Caliper Options. Each kit is engineered to the confirmed EcoBoost, GT, Bullitt, Mach 1, GT350, GT350R, or GT500 trim, so brackets, hat offsets, and mounting geometry are not assumed from the S550 chassis name.
- 380 mm front carbon-ceramic rotors require 19-inch or larger wheels on the S550 Mustang; spoke clearance is checked separately because caliper face clearance varies by wheel design and offset.
- Front braking uses the exact Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, giving non-GT500 trims a factory-derived 6-piston front caliper package matched to StopFlex carbon-ceramic rotors.
- Rear braking is matched with a 355 mm carbon-ceramic rotor and a selected Brembo V4, GT4, or GTS4 4-piston caliper option instead of leaving rear torque balance to a front-only conversion.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Ford Mustang EcoBoost / GT / Bullitt / Mach 1 / Shelby GT350 / GT350R / GT500 (S550) |
| Model years | 2015-2023 |
| Front setup | Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper / 380mm |
| Rear setup | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options / 355mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 19" (for the 380 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 380 mm front rotor, so the minimum wheel size is 19". Wheels under 19" 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 upgrade uses the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper, a factory-derived Brembo performance caliper selected for the highest-output S550 Mustang application. Its 6-piston layout spreads clamping load across the pad face to support consistent pedal response and thermal control with the 380 mm StopFlex carbon-ceramic rotor. The caliper is treated as a primary fitment component, so its position is engineered with the correct bracket and rotor-hat offset for the customer’s exact S550 trim.
Rear Caliper (Balance)
The rear axle is configured with Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on a 355 mm StopFlex carbon-ceramic rotor: V4 uses the Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper, GT4 uses the Genuine Brembo GT | M4 4-Piston Caliper, and GTS4 uses the Genuine Brembo GT | S4 4-Piston Caliper. The rear package is matched to support stable brake balance under trail braking, repeated stops, and high-speed deceleration; GT500 electronic parking-brake requirements are handled during trim confirmation.
Front & rear, engineered together: The 380 mm front and 355 mm rear carbon-ceramic packages are engineered together so front torque, rear contribution, pad selection, and hydraulic behavior remain matched to the S550 Mustang’s weight transfer. This avoids the common front-only problem of adding caliper and rotor capacity at one axle while leaving rear response, stability, and pedal feel to an unrelated factory setup.
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 Ford Shelby GT500 Mustang 6-Piston Caliper |
| Front CCB rotors | 380mm |
| Rear calipers | Brembo V4 / GT4 / GTS4 4-Piston Caliper Options |
| Rear CCB rotors | 355mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| 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. |
| Rear caliper option mapping | V4 = Genuine Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 mm rotor GT4 = Genuine Brembo GT | M4 4-Piston Caliper — 355 mm rotor GTS4 = Genuine Brembo GT | S4 4-Piston Caliper — 355 mm rotor |
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 S550 Mustang trim?
Fitment is not treated as platform-wide. StopFlex confirms your exact EcoBoost, GT, Bullitt, Mach 1, GT350, GT350R, or GT500 configuration before production and builds the brackets, rotor-hat offsets, caliper mounting, and lines for that specific car.
What wheel size do I need for the 380 mm front rotor?
The 380 mm front rotor requires 19-inch or larger wheels. Wheel diameter alone is not enough; spoke shape, barrel profile, offset, and caliper face clearance must also be checked against the Genuine Brembo OEM Ford Shelby GT500 Mustang 6-Piston Caliper.
Will the parking brake still work?
Parking-brake handling depends on the trim. Standard S550 trims use a manual cable parking brake, while the Shelby GT500 uses an electronic parking brake, so StopFlex confirms the rear configuration before production rather than assuming one rear setup for every Mustang.
Why switch an S550 Mustang from iron brakes to carbon ceramic?
Carbon-ceramic rotors reduce rotating and unsprung mass, produce much less visible dust, and tolerate repeated heat cycles better than conventional iron rotors in hard street and track use. This kit keeps the 380 mm front and 355 mm rear rotor sizes matched to Brembo calipers instead of using carbon rotors as a cosmetic-only swap.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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