Girodisc Porsche 996.2, 997.1 GT3 Front RotorsThe Girodisc system is a direct replacement for the OE disc on all 996 GT2 GT3's. 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. The Girodisc front rotors are approx 21. 0 lbs vs. 25. 6 lbs for the stock units. This reduction