gas milege

Discussion in '1984-1988 Build-Up/Project Threads' started by actionjack, Nov 26, 2010.

  1. actionjack

    actionjack Newbie

    Joined:
    Oct 17, 2010
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    Location:
    Montana
    Truck:
    87 4x4 xcab
    I installed a 2.25 exhaust from manifold back with no cat and high flow muffler and gas milege has gone down a few miles per gallon. Does a 22 R need some back pressure to operate efficently?
     
    actionjack, Nov 26, 2010
    #1

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