The fine pore, silk-like to the touch, Grand Prix Cover is perfect for fine particle sand conditions. It has elastic around the bottom of the cover that allows it to sit perfectly around the air filter, preventing fine particles entering the filter and in turn your engine. The Cover will act as an additional layer of protection and extend service time between filter cleaning. GAS GAS MX MC85 21-23 MC125 21-23 MC250 22-23 MC250F 21-23 MC350F 22-23 MC450F 21-23 GAS GAS ENDURO EC250 21-23 EC300 21-23 EC250F 21-23 EC350F 21-23 GAS GAS XC EX250 22-23 EX300 21-23 EX250F 21-23 EX350F 21-23 KTM MX 85 SX 18-22 125 SX 16-22 150 SX 16-22 250 SX 17-22 250 SX-F 16-22 350 SX-F 16-22 450 SX-F 16-22 KTM ENDURO 250 EXC 17-18 300 EXC 17-18 150 EXC TPI 20-23 250 EXC TPI 18-23 300 EXC TPI 18-23 250 EXC-F 17-23 350 EXC-F 17-23 450 EXC-F 17-23 500 EXC-F 17-23 HUSQVARNA MX TC 85 18-22 TC 125 16-22 TC 250 16-22 FC 250 16-22 FC 350 16-22 FC 450 16-22 HUSQVARNA ENDURO TE 150 17-19 TE 250 17-18 TE 300 17-18 TE 150I 20-23 TE 250I 18-23 TE 300I 18-23 FE 250 17-23 FE 350 17-23 FE 450 17-22 FE 501 17-23 HUSQVARNA XC TX125 17-19 TX300 17-22 FX350 17-22 FX450 17-22