2015-2023 Ford Mustang EcoBoost (S550) CCB Big Brake Kit | Brembo GT350 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 GT350 Mustang 6-Piston Caliper Front + Genuine Brembo GT4 Rear Setup
S550 Mustang owners usually shop carbon-ceramic brakes after repeated track heat, iron-rotor dust on open wheels, or the cost of replacing high-performance brake consumables on GT, Mach 1, Shelby GT350, and GT500 builds. This StopFlex kit pairs a Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper with a 380 mm front carbon-ceramic rotor and matched 355 mm rear carbon-ceramic hardware for higher heat capacity, lower rotating mass, and reduced brake dust. Each kit is built to the confirmed EcoBoost, GT, Bullitt, Mach 1, GT350, GT350R, or GT500 configuration instead of assuming one bracket and hat offset fits every S550.
- 380 mm front carbon-ceramic rotors require 19 inch or larger wheels; final spoke clearance is checked against the customer's wheel design before the kit is built.
- Front braking is based around the Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper, not a generic aftermarket caliper renamed for the S550.
- Rear braking uses a 355 mm carbon-ceramic rotor with the selected Brembo V4, GT4, or GTS4 4-piston rear caliper option to keep rear torque and stability matched to the front upgrade.
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 GT350 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 axle uses the Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper, a proven OEM-derived Brembo fixed caliper selected for its piston count, stiffness, and compatibility with a 380 mm front rotor package. The 6-piston layout spreads clamping load across the pad for stable pedal response and controlled pressure distribution during repeated high-speed stops. StopFlex engineers the caliper mounting, bracket geometry, and rotor-hat offset to the buyer's exact S550 trim rather than assuming EcoBoost, GT, Mach 1, GT350, and GT500 knuckles share the same clearance envelope.
Rear Caliper (Balance)
The rear axle is matched with Brembo V4 / GT4 / GTS4 4-Piston Caliper Options on a 355 mm 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 supports brake balance and straight-line stability under trail braking and hard deceleration.
Front & rear, engineered together: The 380 mm front and 355 mm rear carbon-ceramic rotor package is engineered as a system so front torque, rear contribution, pad area, and hydraulic response are matched. That matters on an S550 because a front-only big brake conversion can increase front bias without addressing rear heat load, rear stability, or pedal consistency.
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 GT350 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 |
FAQ
Will this kit fit my exact S550 Mustang trim?
StopFlex does not treat S550 fitment as one-size-fits-all. EcoBoost, GT, Bullitt, Mach 1, Shelby GT350, GT350R, and GT500 orders are verified by exact trim, wheel package, hub geometry, caliper clearance, bracket requirement, and rotor-hat offset before production.
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; StopFlex also checks spoke clearance for the Genuine Brembo OEM Ford Shelby GT350 Mustang 6-Piston Caliper before the kit is finalized.
Will the parking brake still work?
This S550 Mustang generation uses a manual cable parking brake rather than an electronic parking brake. Rear fitment is built around the selected Brembo V4, GT4, or GTS4 4-piston caliper option and the confirmed parking-brake hardware on the customer's car.
Why choose carbon-ceramic instead of another iron big brake kit?
Carbon-ceramic rotors reduce brake dust, cut rotating mass, and handle repeated heat cycles better than typical iron street rotors. On a Mustang used for road courses, canyon driving, or high-power street builds, the payoff is cleaner wheels, stronger fade resistance, and a more consistent pedal over repeated stops.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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