2012-2013 Polaris RZR XP 4 900 Front & Rear Brake Pads Severe Duty Race-Driven Front and Rear Severe Duty Sintered Metal Brake Pads. Race-Driven exclusive sintered metal compound is designed to withstand extreme conditions Excellent performance in mud, water, sand, racing and any other condition you can throw at them 2012 - 2013 Polaris RZR XP 4 900