Does size matter? - Ford Powerstroke Diesel Forum
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Old 02-06-2012, 08:27 AM
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Does size matter?

Howdy, is there any performance loss with a 5" turbo back exhaust as opposed to a 4" one? I have a 99 F350 and all I have done so far is an intake.....thanks....
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Old 02-06-2012, 09:02 AM
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a different tone is all you will get with a 5" exhaust. As long as you replace the downpipe with a 4" downpipe anything after that is really upto you. Exhaust kits are becoming so cheap anymore, its really up to you if you wanna spend just a tad bit more for the 5" exhaust or not.
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Old 02-06-2012, 09:14 AM
SyN SyN is offline
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Agrees with 7.3L550:
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Old 02-06-2012, 09:39 AM
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I bought a MBRP with a 6" tip but was worried bout back pressure and lowend response..So is the 5" a better sound? Lol
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Old 02-06-2012, 09:42 AM
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I personally like the 4" sound on both the 7.3 and 6.0. It's all personal preference.
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Old 02-06-2012, 09:46 AM
SyN SyN is offline
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I have never heard of receiving poor performance from the 5" compared to the 4" only a sound difference... I have heard only 1 or 2-5" exhausts... I really thought they sounded very good.... I do think both had mufflers installed... as for a 5" with no muffler? I have no idea... maybe a bigger Jet... LoL... I think both were on 6.0L...

I have heard the down pipe is the main key to performance...

As for sound? It all depends on the owner... I personally love the sound of 7.3L with 4" turbo back w/delete pipe.... Sounds like a jet!!! Awesome sound... In town would be ok... But on the interstate or highway? Na.... I like a nice quiet cab... to hear crystal clear music or carry on a conversation...

Last edited by SyN; 02-06-2012 at 09:49 AM. Reason: Shut Your Mouth!!
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Old 02-06-2012, 09:50 AM
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No matter what a woman tells you, size does matter. Oops wrong topic, lol.
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Old 02-06-2012, 09:52 AM
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If your wife tells you Size does not Matter!!! You Best start to Worry!!
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Old 02-06-2012, 10:18 AM
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i have a 4inch turbo to 5inch stacks exhaust. lets just say you know your truck is running and the turbo is spooling and you wont forget
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Old 02-06-2012, 11:06 AM
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Been doing this research on my own. Some say with the 5" you lose some low end torque but turbo spools faster than with the 4" but many also agree that you can't tell that much difference.
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