Girodisc: Porsche:997.1 C2/C4:Front 340mm 2-piece Rotor Upgrade

The Girodisc system is a direct replacement for the OE disc with the addition of our provided caliper spacers and longer bolts. Our rotor is slightly larger than the OEM rotor at 340mm versus 317mm providing greater braking force and cooling capacity.

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 8 or 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 grade 12 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.

Sold/priced per pair

Fits car models: Porsche: 997.1 C2/C4 Porsche: 987 Cayman S / Boxster S


Brand: GIRODISC
Part Number: A1-031

Stock images used. Actual product may vary.