how bout the 400ft of timing chains that inevitably stretch over time and are expensive and complicated to replace (think 4.7 dodge, 5.4 ferds, 427SOHC ferds, 5.7 tundras...) there is a whole plethora of engines plauged by that insanely long chain requirement. And as a bonus the extra valves and everything still don't help the head flow anymore than an apache/hellcat/BGE head.

I am not causing global warming, I am just trying to hold off a impending Ice Age!