yeah nitrous lol. honestly, u may be right about the headers, but i have hardly seen that much gain on other cars with just a header upgrade.
anyways, if u r willing to spend a little money here is what i suggest u invest in for after market parts that will gain u the most hp without having the price and high maintenance of a turbo or supercharged car and is alot more simple of a concept to those who are new to the subject.
Cold air intake, headers, throttle body, high-flow cat, resonator, muffler, and new piping. Have it all installed. Remap the ecu for any piping changes to fine tune to the flow and what not. IMO, this gives u remarkable gains even though it is not a turbo.
but that might be overkill for ur budget (especially remapping the ECU) so im not sure. those are ur options i guess, let the professionals tell u though, because i haven't been here that long
