4" or 5" exhaust? - Ford Powerstroke Diesel Forum
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Old 01-09-2009, 10:33 AM
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4" or 5" exhaust?

What is the difference, and performance gains of both?

I currently have a 4" turbo back on the truck right now, but Im not sure what kind. It had it on there from before I got it.

I work for a machine shop and was thinking of asking them to bend up some 5" stainless...

would it be worth the money for the performance gains, if any at all?
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Old 01-09-2009, 10:37 AM
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Sick with the 4in, you would just be pissing away money to replace it with 5in
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Old 01-09-2009, 10:43 AM
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Yup, 5" is a waste really. If you need a price on anything let me know.
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Old 01-09-2009, 12:10 PM
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Quote:
Originally Posted by baseballguy View Post
would it be worth the money for the performance gains, if any at all?
If your just using exhaust, tuner, and/or intake then it's not going to be worth it to go to a 5in system. In fact, you'll see some low end loss in power unless your pushing more air and fuel.
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