Aftermarket manifolds

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Gumper, Jul 24, 2018.

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  1. Jul 24, 2018 #1
    Gumper

    Gumper Road Train Member

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    So now I have a broken manifold stud causing an exhaust leak on my 3406E. I’ll have to get around to fixing that at some point which will probably involve pulling the manifold off. Are the aftermarket manifolds worth doing? I see they claim a fairly decent fuel mileage and power increase along with reduced exhaust temps. If they are worth the money then I may as well put one on while I have the stock one off anyway.
     
    Gumper, Jul 24, 2018
    Gumper, Jul 24, 2018
    #1
    blairandgretchen Thanks this.
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  3. Jul 25, 2018 #2
    MM71

    MM71 Heavy Load Member

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    PDI, Bully Dog, and full tilt manifolds are all the same ... manufactured by full tilt. I threw a turbo on at the same time as new manifold. Before the pyro would climb past 1k and I'd drop a gear to get the temps down. Now it will not get above 900 on a pull. Dropped probably 150 degrees average when rolling loaded.

    As for MPG ... with turbo and manifold I probably picked up better than a half.

    I wouldn't buy and use the bully dog gaskets. Go with Cat.

    Hoovers has a pretty good price if you call them up.
     
    MM71, Jul 25, 2018
    MM71, Jul 25, 2018
    #2
  4. Jul 25, 2018 #3
    swaan

    swaan Road Train Member

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    Absolutely. If you need a new one then get a bully dog. Make sure you replace all the studs and nuts also.

    Deffinatlly a lot better manifold then stock.
     
    swaan, Jul 25, 2018
    swaan, Jul 25, 2018
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    Aces-N-Eights Thanks this.
  5. Jul 25, 2018 #4
    Aces-N-Eights

    Aces-N-Eights Light Load Member

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    Same applies to the C-15 (6NZ) ??
     
    Aces-N-Eights, Jul 25, 2018
    Aces-N-Eights, Jul 25, 2018
    #4
  7. Jul 25, 2018 #5
    blairandgretchen

    blairandgretchen Road Train Member

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    Ditto the question - on a 12.7 Detroit?
     
    blairandgretchen, Jul 25, 2018
    blairandgretchen, Jul 25, 2018
    #5
  8. Jul 25, 2018 #6
    dustinbrock

    dustinbrock Road Train Member

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    If the studs breaking again is a concern, send them away for a cryogenic treatment. Place I use charges $6/lbs.
     
    dustinbrock, Jul 25, 2018
    dustinbrock, Jul 25, 2018
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    Tug Toy and blairandgretchen Thank this.
  9. Jul 25, 2018 #7
    blairandgretchen

    blairandgretchen Road Train Member

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    Basic explanation of the process/application please sir?
     
    blairandgretchen, Jul 25, 2018
    blairandgretchen, Jul 25, 2018
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    Tug Toy and Aces-N-Eights Thank this.
  10. Jul 25, 2018 #8
    dustinbrock

    dustinbrock Road Train Member

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    They take your bolts and cryogenically freeze them. It makes them way more robust and is a very good thing for head bolts.... I'm doing mine for my SDP cat rebuild right now as well as exhaust bolts.
     
    dustinbrock, Jul 25, 2018
    dustinbrock, Jul 25, 2018
    #8
    Tug Toy, Aces-N-Eights and blairandgretchen Thank this.
  11. Jul 25, 2018 #9
    blairandgretchen

    blairandgretchen Road Train Member

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    Interesting. Thank you.
     
    blairandgretchen, Jul 25, 2018
    blairandgretchen, Jul 25, 2018
    #9
  12. Jul 25, 2018 #10
    stillwurkin

    stillwurkin Road Train Member

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    I have think its a PDI I purchased apprx 4 years ago. Smooth flow and no issues with it or bolts. On a C-15 6nz. Fuel mileage not noticeable . Exhaust temp slightly lower.
     
    stillwurkin, Jul 25, 2018
    stillwurkin, Jul 25, 2018
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    blairandgretchen Thanks this.
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