Brand New Race-Driven Severe Duty Brake Pads fits the following models: 2016 Polaris Ace 900 SP. You will receive 2 sets of pads, enough to replace the front brakes. These pads are the newest design and tested compound by Race-Driven. Tested in our independent test facility these pads outlasted the most famous brands of brakes, they have many hours of testing in all environments. These pads will work excellent in all conditions including mud, water, sand, racing and any other condition you can throw at them.