CNC machined from billet aluminum Compatible with ABS brake systems Designed and engineered to be extremely rigid and perform consistently in all braking scenarios Cooling fins are CNC machined into each side of the inner caliper to disperse heat Front calipers available for 11.8" brake rotors Rear caliper kits include CNC machined billet caliper bracket and necessary hardware. CALIPER R 4PISTN BL FLH