Fitment: (07-09) Arctic Cat Crossfire 8 / Crossfire 8 Sno Pro, (07-09) F8 / F8 Sno Pro / LXR, (07-09) M8 / M8 Sno Pro. Must use stock intake boots. Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. No modifications required. This reed is designed to be used with the factory manifolds.