I have a 97 hatch sohc non-vtec d16y7, and I have done all the mods in question, but with different brands. Since I don't have the same brands, the end result may fluctuate a horsepower or three, but nothing major. I can say that while I didn't really notice a change in speed with gaining 5-10 horsepower, I did notice an overall inprovement in performance such as throttle response. The power does come on earlier, though there isn't necessarily more of it. Now I've concentrated on improving suspension and handling, and that is where Ive found the most enjoyable and rewarding mods yet. If I had to do it again, I would skip the intake, header, etc. and go to suspension and save the engine work for when I can swing an engine swap or turbo. I certainly wouldnt do it on an auto tranny.