Quote Originally Posted by davefedoroff View Post
what if i just cut the exhaust after the first muffler?
That second muffler is really just a resonator. Its hollow all the way through. Just a straight pipe with holes punched in it. I don't think its restrictive at all. Mine fell off somewhere and I just replaced it with a piece of straight pipe. I don't even think it sounds different. Except maybe under a load.

Just start with the tuneup. My 472 pulls like a freight train and its almost bone stock.