GMA Engineering Billet Aluminum 4 Piston Front Caliper Kit for Harley-Davidson Features:
2 and 4 piston calipers machined from heat-treated aircraft quality, billet aluminum 5/8 in bore master cylinder required for single disc.
3/4 in bore for dual disc applications 2 piston calipers utilize two 1-5/8 in pistons.
4 piston calipers use four 1-1/4 in pistons Kits include brake pads, hardware and brackets GMA Caliper Model - F Made in USA This product can be used with Model Part# Harley-Davidson FX Late 77-83 BA4PFCKHD-1 Harley-Davidson FXWG Late 77-83 BA4PFCKHD-1 Harley-Davidson XL Dual Disc Late 77-83 BA4PFCKHD-1 Harley-Davidson All Models (except Springer) Single Disc 84-99 BA4PFCKHD-2 Harley-Davidson All Models (except Springer) Dual Disc 84-99 BA4PFCKHD-3 Harley-Davidson All Models (except Springer) Single Disc 84-99 BA4PFCKHD-4 Harley-Davidson All Models (except Springer) Dual Disc 84-99 BA4PFCKHD-5