Bumnah is a hater, dont sweat his "words of wisdom"...you could show him dyno's all day long and it wont make a difference. Just nod and smile!

People do overhype the whole bolt-on thing, but they do make a difference, especially after you get into more serious modifications. Never mind the fact its a pretty good simple foundation for learning about your car in terms of the parts, how to do the work, and how things react with each other.

I'd say on a stock B18B, a decent I/H/E setup would give you 8-10whp. Not much at all. Would the money be better invested towards a turbo kit? IMO, yes, but not everyone is looking for that sort of power.