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  1. #1
    demian5's Avatar
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    Scored some performance 650/750 heads

    I need help understanding the benefits of these heads. I scored them from a friend. The combustion chambers are clean. I have a 750ssxi all stock engine wise and am wondering if any of these heads will increase performance without sacrificing reliability. Thanks.

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    PJS with o-rings
    Red Mariner (says 650 on bottom)
    Pink Mariner 750
    Stock something
    In an extra envelop I have what looks like a brand new 750sxi head as well

    Thanks for the input!


  2. #2
    demian5's Avatar
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    Really? Nobody?

  3. #3
    badjoka's Avatar
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    I have both the mariner and pjs. Pjs will raise compesion, better petformance. love my pjs head! The heads may have been machined for higher compression. Install each one and see what psi you are getting for each.

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