FAB-Spindle 2-Piston 10" x .35 Slotted L/D Drag Brake for Chassisworks Drag Race Fabricated Spindle (6164). The 10" diameter .350" thick slotted rotor with curved gas-reliefs, combined with the 2-piston Wilwood caliper will supply adequate brakes for vehicles under 2400 pounds. If used with a parachute weight can be as high as 2900 pounds. The billet aluminum hub is drilled for 5 on 4-1/2" and 5 on 4-3/4" bolt circles. Complete with 1/2 x 3", 12-point studs and screw-on dust covers. Kit includes anodized aluminum billet hubs; rotors; 12-point wheel studs; 2-piston Wilwood forged calipers; brake pads; wheel bearings; seals; mounting hardware; instructions and drawing.