GIRODISC A2-185 Rear Brake Rotor Kit for SUBARU WRX STI 2018-Requires brake pads modified to increase clearance. We offer these pads in a variety of compounds. The Girodisc system is a direct replacement for the OE disc. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. This reduction in