Brake Caliper Rebuild Kit O-Ring Rubbers 1.62/1.12/1.12 in Piston Kit. Wilwood 120-5750 Karting Brake Caliper Go Kart. 187in Disc. Wilwood 120-13551 Forged Dynalite-M Caliper. Wilwood 170-3265 HD Fixed Mount Brake Rotor Hat.