This bolt-on brake kit fits stock '67-69 Camaro, '64-72 Chevelle, '64-72 Nova spindles. The 11-3/4" diameter .350" thick slotted rotor with curved gas-reliefs, combined with the 4-piston Wilwood caliper will supply adequate brakes for vehicles up to 2900 pounds. If used with a parachute weight can be as high as 3100 pounds. The CNC machined caliper-mount-brackets will bolt to the spindle using OEM holes. The billet aluminum hub is drilled for 5 on 4-1/2" and 5 on 4-3/4" bolt circles. Complete with 1/2x3" 12-point studs and screw-on dust covers. Kit includes anodized aluminum billet hubs; rotors; 12-point wheel studs; 4-piston Wilwood forged calipers; caliper mounting brackets; brake pads; wheel bearings; seals; mounting hardware; instructions and drawing.