I actually recommend the blox after having experience with all three of these, based on the price, good fitment, and ENDYN told me that the blox flows the best across the RPM band. People say there is no point to putting one on unless you build your block, but I had one on my stock B16 del sol and noticed a difference and if you build it later you are all set up them. Only thing I disliked about the blox was that it makes a whistle type of sound in certain rpm ranges I wish I had known about. bothered me enough that I just got a type R one and replaced it with that even though it flows a little less.
