A rain cap is a protective covering or housing for the top of an exhaust pipe that is intended to prevent the entry of rain, snow, animals, birds as well as downdrafts back into the pipe.
Truckpipesusa.com has a large selection of exhaust pipes to go with all of the Raincaps we sell.
Place the rain cap on the top of the Exhaust Pipe. The Rain cap should fit snug over the top of the exhaust pipe. Tighten the bolt snug. Make sure that the rain cap can move freely up and down to allow the exhaust gas to escape.