Girodisc A1-114 2-Piece Slotted Front Brake Rotor Upgrade, 05-13 BMW 335i E9X Incl xDrive

Description

Upgrade the braking performance of your 05-13 BMW 335i E9X Incl xDrive with Girodisc 2-piece Brake Rotors A1-114.

The Girodisc system is a direct replacement for the OE disc—no modifications are necessary. The disc bolts directly to the car and works perfectly with OE calipers.

The central hat section of the rotor is made from U.S.-sourced 6061-T6 aircraft specification aluminum. The disc is made from Girodisc’s proprietary cast iron, poured and machined in-house in the USA. The rotor features a curved vane design developed in racing to act as a centrifugal pump, forcing cooling air through the disc.

The rotor and hat have a floating mount system utilizing 10 high-strength alloy steel drive pins, manufactured in the USA and cadmium plated for long-lasting corrosion resistance. These pins handle braking loads while maintaining axial and radial float, secured with class 12.9 cap screws and hardened washers. Anti-noise spring washers prevent rattling while allowing thermal expansion, and the float also allows the rotor to self-center between the pads.

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