Join Date: Jun 2001
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Re: Do I NEED a tailpipe after the muffler?
When I worked at an inspection shop here in NH, the rule book said that only solid pipe was to be used. I don't remember if it gave a reason or not. Myguess would be that it's pretty flimsy and therefore prone to leaks/breakage. Some OEMs use a form of flex pipe, usually to connect the down pipe to the cat or intermediate pipe, but if you've ever seen it it's pretty strong. I've also heard from people in other places that it didn't pass. The best way to find out is to call a few inspection shops and ask an inspector. I suggest calling a few shops because at least around here, the inpectors seem to let things slide depending on if they really care or not.
On this topic, I saw a rig at a club show a few weeks ago that had a pretty trick setup. I believe it was a CJ-7 with a 350. The guy patched and welded shut all the holes in the frame (or he had built his own), and taken a piece of OEM flex pipe on each side run from the headers directly into the framerails. At the end of the frame, he cut holes on each side again and welded in some short, curved exhaust tips. Cool setup, but I would think even with heavy gauge box tubing that it would begin to corrode the frame, or that in the front near where the pipes entered the framerails would get super hot and lose strength over time.