making my civic faster

not irrelevant, it's just that this guy obviously isn't ready for nitrous and doesn't want it either. It doesn't matter if it's a single cam or dual cam motor so I don't understand what you mean by that statement. Basic bolt ons won't make it that much more noticeable, no, but it WILL give it a little extra "oompf" as pdiggity stated. You say you're being realistic, but you're not because that's not what he wants...it's about what he wants, not you, but you're entitled to your opinion and your opinion does mean something