All single-disc applications require a 5/8″ bore master cylinder. All front dual-disc applications require the factory 11/16″ bore (84 and later) or the GMA 3/4″ handlebar master cylinder. Brake pads included. Made in the U.S.A.. Not recommended for use with imported stainless steel rotors.. When installing new calipers, always check spoke-to-caliper clearance..