These 4 piston Super Smooth Motorcycle Brake Calipers for Harley Springer type forks come with a beautifully machined billet aluminum mounting bracket. These custom brakes are direct bolt-on replacements for your stock Harley brake caliper. These are the smallest 4 piston motorcycle brake calipers available on the market and are a perfect match to our Drilled Sprocket Rotor Kit, Slotted Sprocket Rotor Kit, Drilled Motorcycle Brake Rotors and Slotted Motorcycle Brake Rotors. Caliper bracket is designed for mounting in conjunction of 11-1/2″ brake rotors and 3/4″ wheel axles.