I've come across a thread or two mentioning equalized intake manifolds, and some vague support for it, but no hard data for actual gains (airflow, HP/TQ or 1/4 mile), or not worth the ROI (unless maybe part of the FAST series?). I seem to remember it being a topic in GSXtra a good while back, and may Greg Gessler may have mentioned it when he did the heads for us a hundred years (or-so) ago. I've searched here a few tabs back, but came up empty. As with everything else, I am sure the rest of the package has as much to do with it, but have to think it can’t hurt anything (but the wallet). More efficient is more efficient. Anything to it? Not worth the effort? Any B4B / Buick porting specialists (It seems Greg is into Q-Jets and not doing port work any longer)?