GMA Engineering Billet Aluminum 4 Piston Smooth Front Caliper Kit for Harley-Davidson Features:
4 piston 1-piece designed caliper Billet aluminum 5/8 in bore master cylinder required for single disc.
3/4 in bore for dual disc applications GMA Caliper Model - M Made in USA This product can be used with Model Part# Harley-Davidson All Models (except Springer) Single Disc 84-99 BA4PSFCKHD-1 Harley-Davidson All Models (except Springer) Single Disc 84-99 BA4PSFCKHD-2 Harley-Davidson All Models (except Springer) Dual Disc 84-99 BA4PSFCKHD-3 Harley-Davidson All Models (except Springer) Dual Disc 84-99 BA4PSFCKHD-4 Harley-Davidson All Models (except Springer) Single Disc 00-Up BA4PSFCKHD-5 Harley-Davidson All Models (except Springer) Single Disc 00-Up BA4PSFCKHD-6 Harley-Davidson All Models (except Springer) Dual Disc 00-Up BA4PSFCKHD-7 Harley-Davidson All Models (except Springer) Dual Disc 00-Up BA4PSFCKHD-8