Performance Machine Six-Piston Differential-Bore Front Calipers For Harley High performance pads and stainless steel lines are just half measures, if you really want to improve the braking performance on your Harley, ditch that stock brake caliper for a Six-Piston Differential Bore Brake Caliper from Performance Machine. PM Calipers have been the industry standard for high performance V-Twin brakes for years. Whether you are building a Show-bike or a Go-bike, PM Calipers will finish off your build with function and style to spare. Features: Designed for 11-1/2 disc applications Dual-disc applications require a left and right caliper These 6-piston calipers work with stock or Performance Machine rotors Available in a variety of finishes Includes brake pads