MBRP 4" turbo back - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 01-06-2012, 05:06 PM
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MBRP 4" turbo back

Hey all, I just finished installing my 4" turbo back with cat delete on my 07. Just hoping to get some feedback on the sound.. It doesn't have as much turbo whistle as I thought it would.. My bro has a 04 with turbo back banks w/ his cat and his sounds more turbo sound.. Is it cause he has a K&N? I don't want to change the air cleaner.. Warranty reasons mostly.. What does everyone think? Sounds good when I give it the beans though!

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Old 01-06-2012, 05:11 PM
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It's your turbo, the '07's have more blades on the turbine wheel, less whistle.

Your bro has either a late '04 with less turbine blades than the '07, or the early '04 which has the '03 motor and less turbine blades than the late '04's.

Get a '03 turbo if you want more whistle.
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Old 01-06-2012, 05:26 PM
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Is the 03 turbo better? Like power or efficiency ?


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Old 01-07-2012, 12:03 AM
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Quote:
Originally Posted by Frankf250 View Post
Is the 03 turbo better? Like power or efficiency ?


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Power gains are negotiable.... According to Eric at Innovative, the 2003-2004 6.0s are known for being a few tenths faster on average due to "the turbo, weight of the truck, computer, cam, and a bunch of other small changes".
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