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Thread: 12ST head

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    Default 12ST head

    Hi all. Greentings from portugal.
    I have an idea of building an motor for my corsa.
    I have here at home an 14NV block and i saw a thread with some ideas of building the motor with the 12ST head,
    I have one here but i'm not sure if it's from an 12ST or from a 12NV, both carbureted, motor. Can anyone tell me the diference between these two heads?
    I'm sorry for my english, and thank you all for the replys.

  2. #2
    Supernova Club Member millworm's Avatar
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    Default

    The head from a 12nv will have square ports in it, the st head will have more rounded ones

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