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. Grand Prix cover - 160000GPBE1 BETA MX 300RX 24- 450RX 24- BETA ENDURO 125RR 20-24 200RR 20-24 250RR 20-24 300RR 20-24 350RR 20-24 390RR 20-24 430RR 20-24 480RR 20-24 250 X-TRAINER 23-24 300 X-TRAINER 23-24