Powerlite PL2R/ST radial mount calipers provide a high strength, lightweight,two-piston option for open wheel, formula car road racing and other similar types of competition, where high clamping efficiency within a limited wheel space and optimized rotor diameter are Required. Designed with Machined billet aluminum body with offset 1.75” piston bores and Common radial stud spacing and mounting offsets. The PL2R series uses Top-loading quick-access type 7912 pads in a variety of compounds. PL2R/ST caliper feature: Nickel plated Quick-Silver body finish with Thermlock pistons.