Umm yaa power is in the heads, ... Show me one stock dual intake port that runs faster than a 14 second 1/4 mile....Ya there aren't any, they are all worked over to atleast 35mm port diameter, or welded to 40mm . My singleport intake diameter is not even close to stock size, and the turbo doesn't care about velocity, so there you can imagine the size it is, it's welded and bigger.
Kevin