Twin Air Dual-Stage Air Filter for 2004-06 Suzuki RM-Z250 - 153217 1981 Suzuki GS650 1986 Kawasaki KX250

1986 Kawasaki KX250

2012 Honda CBR600RR

What this accomplishes is that the ECU is told that the intake air is a little cooler than it is

2016 Arctic Cat Wildcat 1000 Sport XT

Twin Air Dual-Stage Air Filter for 2004-06 Suzuki RM-Z250 - 153217 1981 Suzuki GS650 1986 Kawasaki KX250Twin Air Racing Dual Stage Air Filter Part Number: 153217 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