valvetrain

  1. V

    Headgames S55 spring / stud kit

    From their IG today. Word is they're trying some new stuff with the valve springs that will trickle down to N54/55 if it works out. Any important info / details to ask about their setup? I know nothing about valvetrain stuff
  2. 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...
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