Wilwood AERO4 RearTruck Kit 14.25in Drill Red 1999-2010 GM 1500-SUV 1 Piston OE CaliperAERO4 Big Brake rear axle kits replace the factory disc brakes and use the OE parking brake assembly as a compliment to front big brake upgrades on late model trucks and SUVs. High capacity braking from the AERO4 calipers, BP 10 compound pads, and oversized rotors are matched to the OE master cylinder output, ABS function, and individual vehicle bias requirements. Enhanced brake performance, increased durability, and high tech style compliment big