FlowMaster Exhaust

Discussion in '2004 - 2008 Ford F150 Truck Forum' started by Brettp, May 9, 2018.

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  1. Brettp

    Hey guys, I’m thinking of buying a Flowmaster Outlaw Exhaust System for my 2005 F-150. I’ve seen many things saying it will either improve or make my MPG worse. Effect on MPG is not a deciding factor for me getting an aftermarket exhaust but what is the most likely effect?
     
    Brettp, May 9, 2018
    #1
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  2. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Cat-back exhaust alone should have very little if any effect on mileage, in my experience.

    That's going to be a loud exhaust!
     
    FTZ HAIC, May 9, 2018
    #2
    Brettp likes this.
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