I hate talking about coolers on here as it turns into a company v's company debate..but would not go a PW stage 2, the heat soak at the track was crazy for such an expensive cooler and that's at 320kw,is fine for the odd drag run, I went 11.7 with this cooler, but not for continual runs like powercruise... stage 3 is much better as it uses mass for efficiency, but just to big and heavy for my application.. Am in no way bagging PW, I have his products as well.. my 2 cents