4" down pipe?
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Joined: Jul 2004
Posts: 21,113
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From: Ohio
Currently in a similar conundrum myself, after years of driving a 7.3 I'm really enjoying how quiet my 6.0 is and don't want to increase the in-cab noise. Currently my truck has a stock exhaust but looking into options, main duties will be some daily driving and occasional towing of 5-6k. I'm thinking 3.5" down pipe to 4" with some sort of a good quality muffler at this point, anyone with insight that would suggest I'm leaning the wrong way?
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Elder User
Joined: Jan 2004
Posts: 900
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From: Arizona
Sounds excellent. Looks and runs good.
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More Turbo
Joined: Dec 2003
Posts: 571
Likes: 4
From: hondo
FYI, was going back to oem but when i removed the 4"dp I could see on the dp where it left a rub mark from hitting the fire wall. About 2"spot. Also had another spot rubbing on transmission support brace. So I took a hammer to it and put back. Adjusted the exhaust hanger to lift off the tranny brace. No more vibration and sounds great. To me it does have a deeper growl than with oem.
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