Twin Air 158028 Racing Air Filter for Beta RR 250 / 350 / 390 / 400 / 450 / 2000 KTM 640 LC4 Duke 1998 Polaris Indy Storm 800

1998 Polaris Indy Storm 800

2015 Polaris Indy 600 SP

2003 Kawasaki KAF620E Mule 3010 4x4

2012 Honda TRX420TE FourTrax Rancher ES

2003 Triumph Sprint RS - 955

Twin Air 158028 Racing Air Filter for Beta RR 250 / 350 / 390 / 400 / 450 / 2000 KTM 640 LC4 Duke 1998 Polaris Indy Storm 800Twin Air Racing Dual Stage Replacement Air Filter Fused dual layer design for a combined increase in performance and protection Revolutionary micro gluing process minimizes seams for added protection Washable and reusable up to 50 times without replacement New Round design boosts air flow Twin Air's breakthrough, fused dual layer design (now widely copied) for combined performance and protection. The fused layers of open pore foam and fine inner foam