uss_essess Posted July 7, 2012 Share Posted July 7, 2012 Anyone out there know the diameter of the exhaust piping between the cat and muffler on a 1985 Brat? The car is out in the boonies, so I don't have easy access to it, and I would like to save myself a lot of driving. Link to comment Share on other sites More sharing options...
bratman2 Posted July 8, 2012 Share Posted July 8, 2012 If memory serves me it is 1 7/8". I replaced mine with 2". Link to comment Share on other sites More sharing options...
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