Forged Narrow Superlite 4R caliper rear road race kits provide matched performance in conjunction with FSL6R and AERO6 front race kits on vehicles built specifically for competition. FNSL4R/ST calipers use Thermlock pistons in the calipers resist fade and extend service life by reducing the heat transfer from the pads, caliper body, fluid, and seals. Radial mount brackets attach the caliper in the stock location. GT series directional vane competition rotors provide high efficiency cooling and mount to the drive axles with forged aluminum hats. Kits also include high temperature, high friction race compound pads and all premium grade fasteners.