Pipe is 16 gauge wall 9 inches long and tig welded with gloss black finish pipe size 1.750″ O.D. This has a machined step flange fits stock exhaust ports on Milwaukee 8 cylinder heads. By testing your exhaust port with and without a pipe you will know how it effects the flow positively or negatively. Flow pipe improves flow roughly 5 percent over an exhaust port with no pipe. Mounting hardware included.