Deep snow and extreme conditions place enormous loads on your sled and especially your drive belt. This extreme load creates incredible amounts of heat that shortens drive belt life and reduces performance. The Blow Hole removes that heat via a high output fan. This “Active Venting” system is built out of durable aluminum and has a welded design to put up to the abuse of mountain riding. Reduces under hood temps, clutch and belt temps and restores performance without installing “passive venting”. The impressive under hood temperature reduction through the use of the Blow Hole leads to belt and clutch temperature reduction, extended belt life and improved engine performance.