grunt 63. I am a retired tig welder. I cut mine off after measuring he stock converter. went down to a muffler shop, and had them make me a piece of exhaust pipe that would fit and formed to the shape required. It cost me twenty bucks I did the welding also installed a XIED. it runs great a lot cooler sound great. Also removed the flat crossover pipe and replaced it with a complete round tube. MPG improved to 46 and the best the oil never gets hotter then 220 even after 90 mile of continuous riding in Texas weather.