The brake caliper or calliper, is an essential component of a disc brake; the brake pads are mounted to the brake caliper and the hydraulic pressure of the brake system is converted into mechanical force, i.e. the brake pads are pressed against the brake disc ... There are brake calipers with 2 brake pistons and high-end versions with 4 pistons e.g. from Stage6 R/T. Besides brake calipers in OEM quality, tuning calipers and fancy calipers for customizing for many 2- and 4-stroke scooters and mopeds, we also carry accessories such as breather screws and banjo bolts as well as complete repair kits for AJP, Brembo and Grimeca brake calipers.