New dyno #'s
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Joined: Oct 2003
Posts: 1,454
From: MN/WI
If you are talking about the Mufflex y-pipe for Hooker LTs, It WILL NOT 'bolt on'. It has a 4" outlet, so you will need a 4"-->3" section along with a flange for a true 'bolt in' install. Plus, with all of the tolerances that take effect on cars, these systems never seem to line up nicely, so prepare to do some convincing.
Chris
Chris
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tdigger9899
General 1967-2002 F-Body Tech
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Sep 7, 2015 10:56 AM