This bolt-on brake kit fits our Chassisworks fabricated drag race spindles. The 11-3/4" diameter .350" thick solid (or optionally available 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 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; brake pads; wheel bearings; seals; mounting hardware; instructions and drawing. Rotors with curved gas-relief slots are optionally available.