HHI custom calipers are inherently stronger, more rigid and weigh less than the average stock or OEM caliper. Precision CNC-machined Billet Aluminum construction. Engineered with Dual EPDM Polymer Seals, and Stainless-Steel Pistons. Features differential bore technology for optimum performance in late model kits. All kits are complete with Chrome Grade 8 Hardware and fittings. Quick-change design for easy pad maintenance Dual, hidden bleeders for easy bleeding Comes in Show Chrome & Black Anodized Finish. Applications for use with 13-inch brake rotors only. Made in the U.S.A. .