Big Gun Exhaust 40-S003 PartsBig Gun Exhaust 40 S003 Parts From backwoods trails to the open desert, many riding areas require the use of a spark arrestor. Check your local laws and regulations to see if you need a spark arrestor, and if so, look no further. Our spark arrestor is compatible with all Big Gun Exhaust systems and is easy to install. After all, no one wants to start a forest fire or get an expensive ticket for not having one! USFS Forestry Approved (Screen Type)