ported head

  1. V

    Ported Cylinder Head

    What's the best option if I want to do a head swap sometime in the near future? ABR? Local machine shop? What are my best options if I want to build an 8,000 rpm N54 with oversized valves? I do not want a VAC head because their freeze plugs have popped off on multiple builds, their machining...
    • veer90
    • Thread
    • cylinder head port and polish ported head valvetrain
    • Replies: 13
    • Forum: N54
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