GiroDisc2-Piece Floating Replacement Rotors for OEM Steel (set of four) for 987 / 987.2 Cayman S / Boxster S

Girodisc is a Braking Technology company that is dedicated to the development and manufacturing of high quality brake components and complete brake systems. The Girodisc products are engineered and designed for both street and track applications. Girodisc produces a comprehensive product line of two-piece floating rotors that are designed to be a direct replacement for your factory rotors. Girodisc also offers a complete line of braking components to compliment your total brake package including pads, fluids, lines and titanium shims. Girodisc rotors are manufactured to the absolute highest standards to provide you with the best braking performance available anywhere. Girodisc’s relentless pursuit of enhanced braking performance has earned the brand multiple victories in Porsche endurance racing. Girodisc combines lessons learned and the latest technologies together to develop the highest performance braking systems for your sports cars.

The Girodisc system is a direct replacement for the OE disc with the addition of our provided caliper spacers and longer bolts.  

The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum.  The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc.  The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.

The rotor and hat have a floating mount system, which utilizes 10 high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.

Once the Girodisc system is in place, simply replace the cast iron rotor when needed. 

Front rotor is slightly larger than the OEM rotor at 340mm versus 317mm providing greater braking force and cooling capacity.  

Rear rotor is slightly larger than the OEM rotor at 325mm versus 298mm providing greater braking force and cooling capacity.  

Sold/Priced as a set of four.