I have the Pypes 2/12" stainless steel system on my GT-37 and the tail pipes seem to fit well with no clearance issues. You can see photos of my exhaust on the Pypes web site and if you Google "Pypes GT-37" you can also see a video of my car and what it sounds like.
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1971 Pontiac GT-37
Car is a junk yard dog and maybe one day will be restored.
