Billet aluminum Raw metal on black contrast calipers is anodized for a long-lasting high-quality finish Hanger brackets and brake pads included Made in the U.S.A. The OLD-STYLE Wagner and Kelsey-Hayes (die-cast aluminum OEM) on rear applications have a 3/4" bore master cylinder and WILL NOT WORK CORRECTLY. Not recommended for use with imported stainless steel rotors. Requires use of 5/8" bore master cylinder.. CALIPER RR 81-84FX SM CHR