4" or 5" exhaust - Ford Powerstroke Diesel Forum
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  #1  
Old 11-07-2010, 09:05 AM
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4" or 5" exhaust

Im going to order a black maxx tuner, s and b intake and a ss exhaust downpipe back in a 4" or 5". Whats better a 4" or 5"? Im thinking a 5" but let me know what u guys r running. Also should i go with a muffler or not. Thanks for ur help
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Old 11-07-2010, 09:18 AM
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you wont see a performance diff between 4" or 5" so i would just go with 4" if it were my own truck....

let me know if you need a good price on the whole setup

-Raul
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Old 11-07-2010, 09:20 AM
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i personally like my 5, i wouldnt get a muffler if i did it again.
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Old 11-07-2010, 09:30 AM
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Why no muffler and what about changing the downpipe out also
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Old 11-07-2010, 10:00 AM
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the DP will increase throttle response and probably lower EGTs a little. It will allow more flow therefor more power. I went with Powerstroker67's DP and am very happy with it.
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Old 11-07-2010, 01:01 PM
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A 5 inch has a deeper tone with less hair dryer sound.
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Old 11-08-2010, 01:45 PM
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If you are thinking about 5", I would go ahead and do it. Most people that were on the fence usually end up kicking themselves for going with 4". Its all personal preference though. I run the 4" straight piped kit on my truck and really like the way it sounds outside. Inside the cab it is very close to stock. The 5" will have a deeper tone and be a little louder outside as well as inside the cab. Inside the cab noise is still not bad at all though.
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Old 11-08-2010, 03:07 PM
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5" the smoke just kind of blows out into large clouds close to your vehicle, 4" has velocity and makes the clouds of smoke travel further over. So 5" if you want to close the lanes down behind you. 4" if you want it to travel more to the side and away from the truck with the large amounts of smoke.
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Old 11-08-2010, 03:10 PM
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no offense to 4 inchers...but 4 inch sounds like a hairdryer. which is gay.

i have a 5 inch flopro kit from Rudys and it sounds sick and has a bit of a vacuum sound at idle
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Old 11-08-2010, 03:17 PM
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I love the startup rumble of the 5" and the turnoff sound is great also.
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