KCB serial number look up?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by OFT2024, Mar 17, 2025.

  1. OFT2024

    OFT2024 Bobtail Member

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    Apr 23, 2024
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    Can anyone look up Kcb40386 for me?
    Trying to find HP range thank you
     
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  3. bjytech

    bjytech Light Load Member

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    207
    Nov 9, 2013
    Ohio
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    That serial is good for 335-470HP uprate family "B", came factory set at 410HP.
     
    OFT2024 Thanks this.
  4. OFT2024

    OFT2024 Bobtail Member

    17
    2
    Apr 23, 2024
    0
    If I am understanding this correctly the internals per that family will only hold 470hp regardless of tuning ect
     
  5. bjytech

    bjytech Light Load Member

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    207
    Nov 9, 2013
    Ohio
    0
    With factory tuning, yes.
    There are some custom tuners out there but that's not something that's really allowed to discuss on this forum, and pushing them too hard tends to drop reliability quite a bit.
     
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