Guest Gp crazy Posted February 22, 2004 Report 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
per0781 Posted February 22, 2004 Report Posted February 22, 2004 i would suggest 2.25" for the pipe size Quote
90lum31v6euro Posted February 22, 2004 Report 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
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