The Wilwood AERO4 rear axle kit provides high-capacity braking with AERO4 calipers, BP-10 pads and 14.25" drilled rotors, engineered to work with OE master cylinder output and ABS on late-model GM 1500 trucks and SUVs. The kit replaces factory rear discs while retaining the OE parking brake and offers a durable, high‑tech upgrade that complements big wheel, tire, and suspension modifications.
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.