Fits: KTM 250 SX/SXS-F 11-12, 250 SX/SXS-F 2013, 250 EXC-F 4strk 12-13, 250 XC-F/XCF-W 12-13, 350 SX/SXS-F/EXC-F/XC-F/XCF-W 11-13, 450 SX-F/SXS-F/EXC/SMR/XC-W ('12) 11-12, 450 SX-F/SXS 2013;The best filter in the world can't do its job if there are leaks in the seal of the air box;Twin Air power flow kit for 4-stroke models increases air flow while maintaining safety;Replaces your air-restricting stock backfire screen with the power flow kit;The kit includes a rigid, lightweight, billet aluminum cage with a special backfire-resistant layer of foam laminated to the inside of the filter

• Twin Air 154215c Power Flow Air Filter Kit

Twin Air 154215c Power Flow Air Filter KitTwin Air