Free Flow Mufflers

Discussion in 'Trucks [ Eighteen Wheelers ]' started by SPIKE 64, Apr 2, 2008.

  1. SPIKE 64

    SPIKE 64 Light Load Member

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    Feb 26, 2008
    San Antonio tx.
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    Changed out my heavy restricted factory stock muffler/converter on my 2004 freightliner classic W/C15 CAT acert with a pair of dynaflex aftermarket free flow mufflers , It improved my fuel mileage by 1/4 mile per gallon and overall truck perfomance and engine sound.
     
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  3. bullhaulerswife

    bullhaulerswife Forum Leader/Admin Staff Member Administrator

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    Did it reduce cab noise? Hubby is considering doing this. Where did you run them, behind the bunk or beside the doors?
     
  4. SPIKE 64

    SPIKE 64 Light Load Member

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    Feb 26, 2008
    San Antonio tx.
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    Truck is still quiet , mufflers are by the doors ........
     
  5. bullhaulerswife

    bullhaulerswife Forum Leader/Admin Staff Member Administrator

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    Good to know. I'll be passing this along to hubby! Thanks! :yes2557:
     
  6. 550hpW900L

    550hpW900L Road Train Member

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    norcal
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    I dumped my twin reverse flow mufflers with cats and saw a .5-.6mpg increase...... Straight pipes FTW!!!!
     
  7. blitztex

    blitztex Bobtail Member

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    Jun 3, 2007
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    Ball park figure how much did the dynaflex mufflers cost you? I'm looking to buy some for my 379 pete.
     
  8. Pete_379X

    Pete_379X Super Chrome

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    Hahahaha FTW!!!!!! You're on teh internet toooo much. :biggrin_2559:
     
  9. 1989 Pete

    1989 Pete "Pine Tree Eater"


    Yea I put straights on my 89 Pete the 400 Cummins sounds like godzilla!!!!!:biggrin_2551:
     
  10. SPIKE 64

    SPIKE 64 Light Load Member

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    Feb 26, 2008
    San Antonio tx.
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    ...........................
     
  11. MedicineMan

    MedicineMan Road Train Member

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    Woodville, TX
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    ya babie big cam on straight pips. How do you like your holset sir??? Looud or ear spliting! lol

    My bg cam right now has a single stack with a muffler and you can hear my holset coming long before you see or hear anything else
     
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