What's next for my motor?
 

I have a 93 Civic EX with the stock d16z6 motor in it. After looking around these threads it seems to me the only way to get some serious HP gains is to swap for better motors or put a turbo in. However im not looking to spend that kind of money all at once. Is there anything I can do to my stock motor to get some decent HP gains? I already have a cold air intake, muffler, and im thinking about getting a header and a skunk2 intake manifold next. Im 16 so I cant spend more than about $500 at a time for parts. What parts would you recommend that I get or do you recommend I save for a turbo or swap? Thanks for any advice.

RE: What's next for my motor?
 

get intake/header/full exhaust/ and an intake manifold/throttle body and maybe a vtec cam