HHI has released this exciting new 6 piston caliper for 13″ & 18″ diameter rotors is the first direct bolt-on. Caliper purposely built for the Big Wheel Bagger market. This caliper features a completely redesigned and upgraded 6 piston. The configuration has larger pistons and brake pads which deliver increased overall braking performance. The 13″ & 18″ 6 piston caliper is recommended to be used with the stock size brake master cylinder found on all dual caliper 2007-earlier and 2008 to later Touring model applications.