PFC's ZR34 Caliper is the latest in short track brake technology. It's One-Piece Monobloc Design is made of a high temperature aluminum alloy. This improves release and control and also increases stiffness for less pedal travel, improved response, and decreased drag. Thermal insulating piston heat cups allow the caliper to run at cooler temps. The Radial Mount design also improves torque takeout and further improves release and control.