Designed to provide optimal braking power with no flex Specifically engineered to mate perfectly with the M8 Softail stock rear brake Features differential bore pistons that apply a different force at both the leading edge and the trailing edge of the pads to ensure superior braking CNC machined from billet aluminum ABS and non-ABS compatible Chrome mounting hardware included Made in the U.S.A.. CALIPER 4P REAR CH 18+ ST