Huge StopTech brakes for use with the Currie 2 1/2" floater kit includes 4 piston racing calipers and 13 5/8" diameter x 1.100" thick rotors! Kit is drilled for a 5 on 5 1/2" wheel bolt pattern with 5/8" wheel studs. The 4 piston calipers are forged aircraft aluminum for more strength than a billet piece and feature external dust seals to keep piston bores, pressure seals and fluid clean. Abutment plates prevent any pad movement from destroying the caliper housing. Additional features include aluminum pistons as opposed to stainless steel to keep tolerances consistent throughout the heat cycle, square cut o-rings for quick off-pedal pad retraction, banjo bolt castle locks to keep banjo bolts locked in place and safe from debris and large M10 bleeders for ease of bleeding and less of a chance of stripping.