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Discussion Starter #1
So I'm considering either the catalytic delete pipe or the stock muffler delete pipe from Pure Diesel Power for my excursion. Looking for a little extra noise, but nothing deafening. Not as interested in HP (no studs yet) but mainly mileage gains. I figure I'd go 4" stainless if it weren't for the extra price that I could be spending on gauges, maintenance items, or parts for my other cars.

Which one of these pipes will give me the best increase in mpg?

Is a no muffler/no cat straight piped diesel too loud for daily driving given the giant cabin of the Excursion?
 

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trust me spend some money get you an sct and a complete exhaust system. i just went from hacked factory to a 5 inch mbrp and fuel milage went up 2 mpg. i would have called you a liar if you would have told me that it would happen before i seen it my self.
 

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i have the 4in magnaflow complete kit and i love it gives it a really deep sound with the muffler on, and is not obnoxious
 
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