SX125-300 TC125-250 23-25 MC125-250 24 m-25 Twin Air Powerflow Kit. 
The best filter in the world can’t do its job if there are leaks in the seal of the airbox. Twin Air’s PowerFlow Kits ensure a leak-proof, fool-proof fit with a rigid, lightweight, billet-aluminum cage that replaces your flimsy, plastic stock cage, and a billet aluminum flange with a rubber seal that bolts tight to your airbox.
GAS GAS MX
MC125 24-25
MC250 24-25
GAS GAS ENDURO
EC250 24-25
EC300 24-25
GAS GAS XC
EX250 24-25
EX300 24-25
KTM MX
125 SX 23-25
250 SX 23-25
300 SX 23-25
KTM ENDURO
150 EXC TPI 24-25
250 EXC TPI 24-25
300 EXC TPI 24-25
HUSQVARNA MX
TC125 23-25
TC150 25-
TC250 23-25
TC300 25-
HUSQVARNA ENDURO
TE 150I 24-25
TE 250I 24-25
TE 300I 24-25
HUSQVARNA XC
TX300 TPI 23-25