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post #1 of 7 (permalink) Old 11-09-13, 11:46 AM Thread Starter
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Exhaust Pipe Size

Hey everyone, I have a 2006 Mountaineer v8 and I want to build a custom exhaust system. I am at school right now but want to start designing the system now, and need to know the pipe size. I believe it might be a 2.5 inch but can someone clarify? Also any suggestions on what to do for best fuel efficiency and power would be great!

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post #2 of 7 (permalink) Old 11-09-13, 09:36 PM
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Re: Exhaust Pipe Size

With or without headers?

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 7 (permalink) Old 11-11-13, 11:22 AM Thread Starter
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Re: Exhaust Pipe Size

without headers. I want to run a catback exhaust from where the two individual pipes meet up into one. So i wanted to know the size of that single pipe going all the way out the back. The manifolds and original cats will stay.
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post #4 of 7 (permalink) Old 11-16-13, 07:18 PM
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Re: Exhaust Pipe Size

Stock, from the second muffler back, original is 2 1/4. Not sure if you have room to step up in size, but custom bending and welding will be involved.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #5 of 7 (permalink) Old 11-18-13, 01:32 PM Thread Starter
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Re: Exhaust Pipe Size

Thank you. I know about the job ahead, I have done a lot of work like this before and will not have much trouble, hopefully. Any other improvements that I can make to the car to make it more efficient/ powerful?
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post #6 of 7 (permalink) Old 11-19-13, 07:13 PM
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Re: Exhaust Pipe Size

That always goes back to this question: how much ya wanna spend. Horsepower = $$

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #7 of 7 (permalink) Old 12-02-13, 06:09 PM Thread Starter
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Re: Exhaust Pipe Size

from what my calculations are telling me, 500 will fit the bill for the exhaust. from there im kinda broke haha. but the cheap easy things are what im into.
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