Originally Posted by JEFASOLD

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Could go into the flame propagation advantages to a four valve, plug in center design compared to a three valve with plugs pushed to the sides so need 2). Won't.

Thank you for not expounding on this subject. However you are a little misguided here, that engine was designed to use 2 not that it had to, they do not fire at the same time and it varies which one fires first. It is certainly not an archaic engine technology, to compare it to the old iron hemi is a travesty. And speaking of hemis, almost all engines today are hemis, they just cant advertise that as Chrysler has the rights to the term HEMI