Ford S650 Mustang (w/ 4-pot Brembo) Rear Rotors

These GiroDisc 2-piece rotors are a direct replacement for the rear rotors on the Ford S650 Mustang with 355mm iron brakes, including the GT with Performance Package, Dark Horse, and Dark Horse SC without the optional carbon ceramic brakes. These fully-floating assemblies help shed unsprung weight and rotating mass from the front axle of the vehicle.

The rotor rings are machined from a proprietary casting made of high-carbon iron formulated to GiroDisc's specifications. This superior metallurgy results in a rotor that better withstands hard use, and the curved vanes act as a centrifugal pump pulling air in through the hub to cool the discs. The 2-piece design has a reusable hat which can be installed onto new rings when they need to be replaced.

All major components including the hats, rotor rings, and drive pins are manufactured in-house at our facility in Bellingham, WA from domestically-sourced materials. The hat is made from 6061-T6 aluminum and coated in a black anodize finish. The drive pins are made from a high-strength steel alloy and cadmium-plated for corrosion resistance. All rotors are assembled with spring clips and spring washers for race-ready float while also being street-friendly with no noise from loose hardware.

Outer diameter: 355mm
Thickness: 28mm
Minimum thickness: 26mm
Weight: 18.4 lbs per rotor assembly
Vane count: 48 curved vanes
Replacement rings: D2-343

We recommend replacing the rings when they reach minimum thickness or if a crack forms leading to the edge of the ring.