Race-Driven Severe Duty Sintered Metal Brake Pads You will receive 1 set of brake pads to replace the rear brakes on the following: 2008 2009 2010 Polaris Sportsman 300 4x4 Severe Duty Brake Pads are the newest compound design by Race-Driven. They are a sintered metal pad that will far outlast any pad on the market, semi metallic, organic, or otherwise.