I bought the hedman shorties then took it to aaple muffler over on ambler...along with 6 2.5" u bends from Columbia river mandrel bending...it took him four hours to weld it but he did a pretty good job. I will say this though, buy good gaskets so you don't change them often...because it sucks messing with them. Depending on your build, 2.25" would work fine and be a little easier to mess with. You also really should use a high torque late model mini starter.