Twin Air Dual-Stage Air Filter for 2013-17 Beta RR250/300/350/390 - 158033 2009 Polaris RZR 800 LE 2008 Kawasaki KLX450R

2008 Kawasaki KLX450R

but have not been found harsh or uncomfortable by anyone who has ridden them

2004 Gas-Gas EC300

45mm Piston Size Added 1

2005 Yamaha TT-R125LE

Twin Air Dual-Stage Air Filter for 2013-17 Beta RR250/300/350/390 - 158033 2009 Polaris RZR 800 LE 2008 Kawasaki KLX450RTwin 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