SRS-Concept - SOLID BRAKE CALIPER SLIDER PINS (1571)This is the new solid caliper pins slider kit for BMW. When you give some abuse to your your machine, the oem rubber mounting make the caliper flex andput the stress on the pads and the piston. That will cause lost of braking power, premature wear or in some case the rubber just pop out ( we already have this problem on our drift car )The sleeve was made from premium quality brass for long lasting. The dust cap Withstand temperatures up to 445 F for