Girodisc Slotted Front Rotors For 2021+ BMW M2/M3/M4 (G8X Excl CCM)

USP Motorsports is pleased to offer products from one of the top 2-piece brake rotors manufacturers, GiroDisc. GiroDisc's fully-floating design uses tension hardware to ensure that our rotors are silent on the street, but ready to go on the track. By specializing in this area, they have been able to dedicate their efforts to push their engineering and manufacturing to the highest levels in the industry. When GiroDisc was founded in 2003, they made their mission to design and manufacture 2-piece brake rotors that would perform flawlessly at the limits.

These GiroDisc 2-piece rotors are a direct replacement for the front rotors on the G80 M3, G82/83 M4, and G87 M2 without carbon ceramic brakes. Our 2-piece, 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 holds up better, and the 72 curved vanes act as a centrifugal pump pulling air in through the hub to effectively cool the rotors under hard use. The 2-piece design means a reusable hat which can be attached to new rings (part number D1-282) 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 Belleville washers for race-ready float while also being street-friendly with no noise from loose hardware.

The minimum thickness at which we recommend replacing these rings is 34mm. We also recommend replacing them if a crack leads to the edge of the ring.

Sold and priced per pair.