Exhaust stack size

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dkdist74, Apr 13, 2014.

  1. Edgar2191

    Edgar2191 Light Load Member

    178
    33
    Apr 9, 2013
    0
    I have a single 5 inch stack will adding a Y and another stack help mpg?
     
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  3. magnum2

    magnum2 Light Load Member

    111
    11
    Apr 25, 2014
    0
    Educate me: going to 6 inch from 5 inch on the isx, vgt turbo, from the front flex pipe all the way to the muffler, single pipe, would that make any diff, in the positive way. what kind?
     
  4. russtrucker

    russtrucker Road Train Member

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    Mar 27, 2012
    Central PA
    0
    I want to do mine and place free flow muffler.
     
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