Kits in this competition group are configured for use in unrestricted class road racing with 17” or larger wheels. BSL6R/ST six-piston calipers with Thermlock pistons are matched with 12.90” directional vane GT competition rotors. These proven winners have delivered championship performance in road racings’ most grueling production car categories. Rotors mount to the hubs with forged aluminum hats and radial mount brackets secure the calipers to the OE location without modification. Kits also include high friction race compound pads, premium grade hardware, and stainless steel braided flexlines.