for arguements sake lets say your intake mod got you 5rwkw. personally i think this would be about the maximum gain. i don't reckon you would feel that difference just by driving. it would show up on a dyno but thats about it. plus it may take a little time for the computer to readjust so the max gain would be a gradual difference from before and after so even more reason why its probably more mind over matter if your car feels faster.

Never said it felt like the car was faster i just said it performs better, throttle response is alot better than it used to be. And thier would definately be a gain from it when comparing stock to the setup i have now, it all adds up in the end.