Twin Air Backfire Air Filter Fits PolarisThe Backfire filter includes a laminated layer of backire retardant foam, allowing you to replace the air restricting stock backfire screen. This filter fits on your stock cage, after you remove the stock backfire screen. NOTES Triple Stage foam 15mm (60 45 30 Pores Per Inch) This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to