I could be off alittle here but all of things that you added should not really make your car faster it should just make handle more boost/nos or whatever. I know that it raised the compression and that you probably saw some horsepower gains there. I have a 93 si w/ d16z6 and noticed a very big change when I put on the skunk2 manifold. I just recently went w/ the skunk2 stage 1 cam and that really made vtec alot stronger. It just sounds strange that you would not notice a difference between the manifolds, are you using the same intake on the skunk2 as you did with the stock?