4" Turbo back or 5" cat back - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 06-22-2009, 08:15 AM
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4" Turbo back or 5" cat back

Both are MBRP.

Crew cab, Long bed.

Im wondering what would do better.

wit hthe 5" cat back the gas will flow faster in the stock pipe but not as easy flow compaired to a 4" madrel.

Then the 4" T-back. Im leanin twards 4" all the way
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Old 06-22-2009, 09:00 AM
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I just did the 4" turbo back straight pipe. That's all you need unless you get 600+hp. At idle it whistles like a jet engine but at 2000+ rpm's it sounds very deep and will turn the heads of everyone, even motorcylce gangs!
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Old 06-22-2009, 09:11 AM
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4" TB. Let the truck breathe sum
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Old 06-22-2009, 11:14 AM
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Send a message via AIM to Abrannan19
4" tb is sufficient for anything you want to do with the truck
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Old 06-22-2009, 04:55 PM
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MBRP turbo back

My buddy did a 4inch turbo back and he says that the check engine light stays on now. If he re-sets it the light will stay off for only a couple before coming back on. Does anyone else have this problem?
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Old 06-22-2009, 05:20 PM
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Quote:
Originally Posted by Tow Line View Post
My buddy did a 4inch turbo back and he says that the check engine light stays on now. If he re-sets it the light will stay off for only a couple before coming back on. Does anyone else have this problem?
There's nothing from the turbo back that will cause a check engine light. Your buddy has other problems somewhere.
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Old 06-22-2009, 05:22 PM
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Turbo back all the way!
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Old 06-23-2009, 08:10 PM
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Thats what ive been feeling. Thank you to all
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Old 06-23-2009, 08:20 PM
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Send a message via AIM to BIGBILL105 45
Turbo back!!
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