GiroDisc 2-Piece Rotors & Replacement Rings 2015+ S550 Ford Mustang GT / Bullitt / Mach 1 (6-Piston Brembo)

$ 1,150.00 USD

Shipping calculated at checkout.

Type

Front Rotor Front Ring Rear Rotor Rear Ring

Product variants

Short Description

Take your Mustang’s braking system to the next level with GiroDisc 2-piece front and rear rotors—designed specifically for the S550 Mustang GT, Bullitt, and Mach 1 models equipped with 6-piston Brembo brakes. Whether you're looking to shed unsprung weight, improve heat dissipation, or enhance pedal feel on the street or track, this setup delivers performance without compromising factory ABS or brake balance. Plus, when the rings wear down, GiroDisc makes it easy to refresh your system with direct-fit replacement rings—no need to buy new hats.

Delivery and Shipping

Domestic orders typically arrive within 3-7 business days, while international orders may take 7-14 business days. Please note that additional time may be required for items that are drop shipped or back-ordered.

Price Match Guarantee

We strive to offer competitive pricing and will price match qualifying competitors under certain conditions. Learn more here

Description

Enhance the stopping power, durability, and overall performance of your Ford Mustang S550 with GiroDisc’s high-performance 2-piece brake rotors and direct-fit replacement rings. Designed as a bolt-on upgrade for GT, Bullitt, and Mach 1 models equipped with 6-piston Brembo brakes, this system delivers proven performance for both spirited street use and track-day abuse.

The heart of the GiroDisc braking system is its fully floating 2-piece design, combining a proprietary high-carbon cast iron rotor ring with a lightweight 6061-T6 aluminum hat. This setup dramatically reduces unsprung and rotational mass compared to the factory brake system—improving handling, throttle response, and suspension compliance.

The front rotors feature massive 380mm rings with 72 curved internal vanes that act as centrifugal pumps, drawing cool air through the rotor to reduce fade during extended hard braking. Rear rotors are also vented with 48 curved vanes, ensuring balanced cooling and consistent performance across all four corners.

Every detail is engineered for longevity and precision: cadmium-plated drive pins allow axial and radial float, spring washers accommodate thermal expansion, and the anodized hats resist corrosion under harsh conditions. The result is a quiet, streetable rotor system that still shines under aggressive or track-day driving.

When it’s time for service, simply replace the rotor rings—GiroDisc's modular system means you reuse the aluminum hats, saving time and money without sacrificing performance. Both front (D1-067) and rear (D2-067) replacement rings are sold in pairs and come with all new mounting hardware.

Whether you're daily driving or hammering through laps at the circuit, GiroDisc 2-piece rotors offer the performance edge your Mustang was missing.

Specifications

Vehicle Fitment:
2015–2023 Ford Mustang GT (with Performance Pack)
2019–2020 Ford Mustang Bullitt
2021–2023 Ford Mustang Mach 1
(Only fits models equipped with OEM 6-piston Brembo front calipers)
Warranty: Limited Manufacturer Warranty
Origin: Made in the USA

Front Rotor Specs (A1-067):
Rotor Size: 380mm x 34mm
Weight: ~24.1 lbs each (vs. ~33.4 lbs stock)
Design: 2-piece floating
Vanes: 72 curved internal vanes for maximum cooling
Hat Material: 6061-T6 billet aluminum, black anodized
Ring Material: High-carbon cast iron
Hardware: Cadmium-plated steel drive pins, spring washers, Belleville washers
Compatibility: Direct OEM replacement with factory calipers
Sold as: Pair (left and right)

Rear Rotor Specs (A2-067):
Rotor Size: Matches factory rear setup
Weight: Reduced vs. OEM
Design: 2-piece floating
Vanes: 48 curved internal vanes for efficient heat management
Hat Material: 6061-T6 billet aluminum, black anodized
Ring Material: High-carbon cast iron
Hardware: Cadmium-plated drive pins, noise-eliminating spring clips
Compatibility: Direct bolt-on with OEM calipers
Sold as: Pair (left and right)

Front Replacement Ring Specs (D1-067):
Application: For use with GiroDisc A1-067 front rotor hats only
Rotor Size: 380mm
Material: High-carbon cast iron
Includes: Rings (2) + new hardware
Compatibility: Only fits GiroDisc hats – not compatible with OEM or other brands
Sold as: Pair (rings only)

Rear Replacement Ring Specs (D2-067):
Application: For use with GiroDisc A2-067 rear rotor hats only
Material: High-carbon cast iron
Cooling: Curved vane internal design for superior airflow
Includes: Rings (2) + new hardware
Compatibility: Only fits GiroDisc hats – not compatible with OEM or other brands
Sold as: Pair (rings only)