The Wilwood AERO4 rear axle kit upgrades rear braking with AERO4 calipers, BP-10 compound pads and 14.25" drilled rotors, matched to OE master cylinder output and ABS bias for late-model trucks and SUVs. Designed to complement front big brake upgrades, the kit retains the OE parking brake assembly and adds style, durability, and braking capacity for tow rigs and other high‑GVW applications.
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.