Thread: Ok guys, Exhaust opinions please. Not normal questions.
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  #18 (permalink)  
Old 08-03-2006, 10:29 AM
jonwalden68 jonwalden68 is offline
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Join Date: Jul 2006
Location: Georgia
Posts: 51
Yes you need the back pressure! i have an 04 f250 with the 6.0 with a 5 inch pipe with a 3.5 inch down pipe with no cat but a high flow muffler!I love the sound!
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