The strongest and lightest six-piston calipers available. Only 30 ounces complete with pads the combination of size, Weight, appearance, and high-performance make them perfect for race or custom bikes. Built in England by Harrison Engineering, the six-piston Mini Billet-6 weighs less than most four piston brakes but has 32 percent more pad area for maximum braking with minimum effort. They are computer machined from 6082-T6 billet aluminum for precision fit and durability. Phenolic pistons eliminate heat transfer for fade-free performance. Each caliper is polished and fluid tested to 4000 psi. Calipers sold each, complete with pads. Bolt directly to the fork legs without the need for mounting adapters. For all single and dual disc models 1984 to 1999 (except Springer Softail and 4-speed FL models). Also fits 1983 XR-1000 models. Single disc models use left caliper, dual discs require one of each.