Which exhaust would be the best choice? - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 12-18-2012, 04:32 PM Thread Starter
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Which exhaust would be the best choice?

I am getting ready to buy exhaust for my 09. I am thinking about buying the MBRP 4" turbo back with muffler. I am trying to keep it from being too loud. I drive a lot for work and don't mind the turbo wistle or a little rumble when I get into it, but I don't want it to be loud all the time.

Should I just delete the cat/dpf or will the turbo back work?

How much louder will the intake make the truck?
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post #2 of 17 Old 12-18-2012, 05:06 PM
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It all depends on how much you want to spend. Deleting the cat and dpf would be the cheapest option and then you could replace the stock muffler with an actual muffler that will quiet it up a bit. I have a 5"do back that I upgraded to from a cat/dpf delete pipe and I like the sound. I don't have a muffler on it and I don't figure it's to loud. I just take it easy leaving the neighborhood. If you don't have any future plans of upgrading anything else then I would just get the delete pipe and run it like that for a bit. If you figure it's too loud then just add in a muffler.

I should mention that its a fair bit louder than stock with a straight pipe or even just a delete pipe but not unbearably loud.

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post #3 of 17 Old 12-18-2012, 05:11 PM
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I would just straight pipe it. Down pipe won't make a huge difference if you're not throwing down big numbers. Either 4" or 5". Also, check out the search function. There are about 400 threads on this same topic.


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post #4 of 17 Old 12-18-2012, 05:20 PM
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4" straight pipe...

currently driving a 335i bmw, no more powerstoke

Previous powerstrokes-
2002- F250 XL 7.3 auto, 4x4
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post #5 of 17 Old 12-18-2012, 05:45 PM
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5" straight pipe. Not loud at all. I can have a conversation next to my tailpipe while it idles. And I had a buddy riding next to me on his motorcycle and he said he can't hear me at all. Literally can't hear my truck drive by your house unless I'm really getting on it.


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post #6 of 17 Old 12-18-2012, 06:00 PM
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I second the 5", nice deep badass tone. I had a 4" before that, never again though!


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post #7 of 17 Old 12-18-2012, 06:31 PM
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All you here is my tires when I go by. The 6.4 is way too quiet, I'm running straight 5"

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post #8 of 17 Old 12-18-2012, 06:46 PM Thread Starter
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Which exhaust would help fuel mileage the most?
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post #9 of 17 Old 12-18-2012, 06:53 PM
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Quote:
Originally Posted by 02Fordfan View Post
Which exhaust would help fuel mileage the most?
I don't think there is any noticeable difference from just a delete pipe all the way to a 5" straight pipe in mileage. It's all about sound. Biggest MPG increase is just gonna be the DPF delete.


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post #10 of 17 Old 12-18-2012, 06:53 PM Thread Starter
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Quote:
Originally Posted by fordpwrstroke7 View Post
I would just straight pipe it. Down pipe won't make a huge difference if you're not throwing down big numbers. Either 4" or 5". Also, check out the search function. There are about 400 threads on this same topic.
I wonder if anyone has as sound clip or video of 4" vs 5"?

By the way, what lift with what size tires are on your truck, it looks perfect with the stock 20's.
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