Performance Machine Four-Piston Differential-Bore Rear Caliper For Harley
Stoppers on stock Harley products are rarely outstanding, sometimes adequate, and often awful! Performance Machine has been cranking out high-quality juice brake products for as long as anyone in the custom Harley game. A great set of grabbers can transform your bike – and transform the way you ride your bike.  Differential-bore calipers are special because they have differently sized pistons that engage the rotor at slightly different speeds, giving them a very progressive feel, and ensuring that more powerful braking comes with periods of longer and harder lever travel. With looks as sleek and show-stopping as their performance, PM calipers represent one of the most effective ways to get looks and performance from your machine per dollar spent.
Features:

Dual-disc applications require a left and right caliper

Use either OEM-style or Performance Machine rotors

Available in Chrome,
Contrast Cut
Contrast Cut products start with a finely machined, polished and black anodized part which is then re-machined to expose the bare metal and to highlight the design of the part.
and
Black Ops
Black Ops is a proprietary two-tone black finish featuring gloss black finish coupled with textured black finish on the same part for an aggressive black-on-black look.
finishes

Include brake pads, bleeder screw and banjo bolt

Made in the USA