Brembo Radial Calipers - 4 aluminum 32 mm diameter pistons - two Billet CNC parts body.The caliper's body is machined from Billet Nickel Coated, the same superficial finish used in MotoGP.The nickel coating has optimized the manufacturing tolerances and gives an extremely attractive design.Two features that add benefits of performance and accuracy.Sintered brake pads are included and already installed. Brembo has gone as far as using topological software to machine these calipers to ensure there is no excess weight without compromising the caliper’s structural integrity. The GP4 RX uses four large 32mm diameter pistons that allow for increased braking power, consistency and feel over all OEM non-Brembo calipers. Seating each brake pad in this caliper are special guides that eliminate the need for brake pad pins, making it quick and simple to swap brake pads at home or in the pits. Position: Front Bolt-Center: 108mm Caliper Body: 2-Piece Piston DIA: 32mm Piston Quantity: 4 Piston Material: Aluminum Disc Height: 32-34mm Caliper Material: Billet Aluminum Finish: Nickel Plated Weight (w/o pads): 2.20 lb. (1000g) - Per Caliper Brake Pads: Included (HH Rated Sintered) Offset: 22.5mm Brake Fluid: DOT 4 Note: 2 Caliper Kit Brembo P/N: 220.B010.10