1999 2000 2001 Polaris 400 Xplorer Rear Severe Duty Sintered Metal Brake Pads Race-Driven 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 1999 - 2000 - 2001 Polaris Xplorer 400 4x4