The No Toil Super-Flo Air Filter Kit will allow your machine to have more air for more horsepower. The Super-Flo Air Filter will replace stock filter and air restricting cage with a high-flow air filter and cage. The No Toil Super-Flow Air Filter Kit will fit securely and tight for a strong seal and will not be burdened with a back-fire screen. The Super-Flo Air Filter has a flame retardant inner lining that will protect the bike and the rider from hot spark generated by the backfire from the machine. The Super-Flo Air Filter is easy to install with the No Toil speed knob. So now you are able to install a complete system that will safely replace your OEM filter and cage. Kit Includes: Super Flo air filter OEM fit high-flow air filter cage Speed knob that replaces Fitment: 2008 Yamaha WR250R 2008 Yamaha WR250X 2009 Yamaha WR250R 2009 Yamaha WR250X 2010 Yamaha WR250R 2010 Yamaha WR250X 2011 Yamaha WR250R 2011 Yamaha WR250X 2012 Yamaha WR250R 2013 Yamaha WR250R 2014 Yamaha WR250R 2015 Yamaha WR250R 2016 Yamaha WR250R 2017 Yamaha WR250R 2018 Yamaha WR250R 2019 Yamaha WR250R 2020 Yamaha WR250R 2021 Yamaha WR250R