Exhaust Help 4” vs 5” - Ford Powerstroke Diesel Forum
6.7 Performance Parts Discussion (2011-2016) 6.7 Performance Parts Discussion

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post #1 of 10 Old 09-25-2019, 08:24 PM Thread Starter
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Exhaust Help 4” vs 5”

What are the differences in 4 and 5 inch down pipe back exhaust. Like performance wise and sound wise or anything else. Needing an “off-road exhaust”
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post #2 of 10 Old 09-26-2019, 03:37 AM
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People say the 4" may give a drone, 5" is said to be a "preferred" sound output. Outside of that....no real difference.


My 4" with a MagnaFlow rear section has a nice tone.



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post #3 of 10 Old 09-26-2019, 04:36 AM Thread Starter
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People say the 4" may give a drone, 5" is said to be a "preferred" sound output. Outside of that....no real difference.


My 4" with a MagnaFlow rear section has a nice tone.
Thanks for the information
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post #4 of 10 Old 09-26-2019, 05:41 AM
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Only difference is 5” has a deeper tone to it no power gains 1vs the other just sound.
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post #5 of 10 Old 09-26-2019, 05:45 AM Thread Starter
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Only difference is 5” has a deeper tone to it no power gains 1vs the other just sound.
Is the 5 any louder I’ve got just the DPF delete pipe right now with the stock back half and it pretty much sounds stock besides at idle.
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post #6 of 10 Old 09-26-2019, 05:48 AM
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Not necessarily louder just a deeper overall rumble and tone to it.
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post #7 of 10 Old 09-27-2019, 02:10 PM
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Just went from 4 to 5, the sound is entirely different..much deeper than the 4.

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post #8 of 10 Old 09-27-2019, 04:46 PM
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Originally Posted by joebuck View Post
Only difference is 5” has a deeper tone to it no power gains 1vs the other just sound.
Is the 5 any louder I’ve got just the DPF delete pipe right now with the stock back half and it pretty much sounds stock besides at idle.
Just did a 5 on mine . When I step on it it sounds like a F18 taking off.. other then that just a bit deeper then stock not much louder.
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post #9 of 10 Old 09-28-2019, 01:27 AM Thread Starter
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[QUOTE=CocainePlatinum;16335093]
Quote:
Originally Posted by Mylan1988 View Post
Quote:
Originally Posted by joebuck View Post
Only difference is 5” has a deeper tone to it no power gains 1vs the other just sound.
Is the 5 any louder I’ve got just the DPF delete pipe right now with the stock back half and it pretty much sounds stock besides at idle.
So since I already have a delete pipe in place of the dpf. Would I be better off just doing 5 inch from delete pipe back to save money since it won’t be much louder either way?
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post #10 of 10 Old 09-28-2019, 02:14 AM
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[QUOTE=Mylan1988;16335215]
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Originally Posted by Mylan1988 View Post
Quote:
Originally Posted by joebuck View Post
Only difference is 5” has a deeper tone to it no power gains 1vs the other just sound.
Is the 5 any louder I’ve got just the DPF delete pipe right now with the stock back half and it pretty much sounds stock besides at idle.
So since I already have a delete pipe in place of the dpf. Would I be better off just doing 5 inch from delete pipe back to save money since it won’t be much louder either way?
I dont see why not. Do that and maybe get a 6" exhaust tip. Should sound pretty good with 5" on the back half.
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