Performance Machine (PM) 4-Piston Caliper - Rear - Chrome - 08-17 Softail365776680 Product Description Feature differential bore pistons that apply a different force at both the leading edge and the trailing edge of the pads to ensure superior braking Dual disc applications require the separate purchase of a left and right front caliper Include brake pads, bleeder screw and 3 8" 24 banjo bolt Made in the U. S. A. Notes Calipers listed for 00 03 XL models will fit 04 13 XL models if used with a 9 16" bore master cylinder.