The Wilwood AERO4 rear axle kit replaces factory rear discs with high-capacity AERO4 calipers, BP-10 compound pads and oversized 14.25" rotors to match OE master cylinder output and ABS function for late-model trucks and SUVs. It retains the OE parking brake assembly and is intended to enhance braking, durability, and style for vehicles with larger wheels, tires, and upgraded suspensions.
AERO4 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 SUV’s. 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 wheel, tire, and suspension upgrades on customized vehicles, tow rigs, and all others with increased brake requirements from high GVW.