I have a supertigre 61 with the 2 piece muffler. It has the round header pipe that sticks out about 1 1/2" that the muffler clamps on to. It is the old style, not the silent. The question is, is there any tuning involved with this muffler by sliding it in or out? It looks like if it was installed all the way on it would cause some restriction in the muffler. Would I cut the excess stub off?