Wilwood Dynapro forged billet, lug mount four piston calipers are used in this select group of drag racing kits. Calipers and brackets will mount directly to O.E muscle car spindles. Dynapro Drag Brake kits will supply efficient braking to cars with four-wheel disc brake cars up to 2,800 pounds. or rear drum brake equipped cars up to 2,400 pounds. Dynamic rotor mounting adapters promote less distortion due to high temperature and extends rotor life. Forged billet hubs and direct mount steel rotors provide a weight savings over 30 pounds compared to stock brake system components. Complete kits include all new wheel bearings, hub seals and premium grade hardware to get your muscle car ready to perfom on the track.