This spark arrestor welds to any 2 inch exhaust pipe. It has removable discs so you can dial in your back pressure to get peak performance. It has a 3 inch inlet that you weld too and it has a 6" inch OD. The spark arrestor stands 2 3/4" tall.  These a very popular on street rods and off road cars. Sold each. Fits Dune Buggy # CPR251115-DB.