Yah, that thing has been a topic of many debates. I know for a while Miko insisted it was to stop oil from spewing out of the engine if you ran it with the oil filler cap off. However, that theory ...
right now i have a stock vq30 in my b13 4 door xe, and i've owned and driven every factory cam and trans sr combination and nothing wakes up faster than the vq, not even my 4.75 fd p12 n1 cammed v...