Wilwood 120-7740-BK: GP 310 4 Piston Motorcycle Rear Brake Caliper 1984-up Harley Davidson
GP 310 Rear Disc Brake Caliper
GP 310 4 Piston Motorcycle Rear Brake Caliper 1984-up Harley Davidson 1.25'' / 1.25'' Piston Bores 11.5'' Rotor Dia. 0.25'' Disc Width Right Hand, Standard 3.50'' Mount Spacing Black Powder Coat Finish