okay great thanks guys, so the pipe is 2.25"? That was the main thing i was looking for, i think the specs should fit everywhere else, just wanted to make sure i had the right pipe size, and just to see if anyone had ever done it before. Not going for loudness, which is why I'm getting the delta version of the 40, not the actual 40. I just want a nice throaty growl. I appreciate the advice!