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Old 04-26-2008, 03:01 PM   #3 (permalink)
Duffman
Master EcoModder
 
Join Date: Mar 2008
Location: Edmonton, AB, Canada
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Red flags should be going off.
How can something that you add to your exhaust increase your fuel economy if it does not create a vacuum somehow. This definately looks like a restriction. The only way I could see it helping your MPG was if you took your Cat & muffler off and replaced it with this.
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