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Straightpipe and MPG

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Old Apr 24, 2013 | 02:33 PM
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mrizzo2003ford
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Straightpipe and MPG

Hello,
I am new to this forum and this is my first post. I have a 2003 ford F-350 XLT extended cab 4x4. It was my dad's truck and it has 149,000 miles on it and I was thinking about changing the exhaust on it. However, I have a few questions.
1. Will straightpiping the truck increase or decrease the mpg or will it stay the same?
Also, my dad's truck, a 2006 f-350 lariat crew cab is straighpiped and has big exhausts(4'') but it only gets 13 mpg, where as my truck gets 15 mpg
Thanks,
Mike
 
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Old Apr 24, 2013 | 03:37 PM
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Straightpipes will make it sound great (louder). See here for better MPG: https://www.ford-trucks.com/forums/1...rease-mpg.html

If you straightpipe it, you will prob LOOSE mileage 'cause you'll push your right foot down harder just to listen to it!
 
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