Guest Gp crazy Posted February 22, 2004 Report Share Posted February 22, 2004 cat back systems ? they work on back pressure right ? how big should anyone go on pipe size. I think with a mild 2.8-3.1 pipe size should be 2 1/2 in or bigger right? how about coated pipes good idea or not ? i know a header setup with the right down pipes wiill free up hp and tq at the wheels. just thinking out loud jeff Quote Link to comment Share on other sites More sharing options...
per0781 Posted February 22, 2004 Report Share Posted February 22, 2004 i would suggest 2.25" for the pipe size Quote Link to comment Share on other sites More sharing options...
90lum31v6euro Posted February 22, 2004 Report Share Posted February 22, 2004 from what i understand cat back to be, is just that from the catalytic converter back open the pipe size a bit, adn slap on a less restrictive muffler correct me if im worng on this Quote Link to comment Share on other sites More sharing options...
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