93 H22 prelude

im new. Im 17 with an awesome 93 H22 prelude. all it has is a GReddy Exhaust System, AEM cold air Intake and im not sure about headers. Well right about now I have beat 93 and 94 Integras with Exhausts and Intakes, I have beat f-150's, v-6 mustangs, rangers, my homebois Hatch(stock), and I raced a Mustang GT and suprisingly and honestly I beat it but then again ppl say how it can be also the driver but c'mon a Mustang GT. Well im not trying to bragg but I didnt think my idiot self could. Well What I wanted to know is how to make my car a little faster without stripping it. its my daily car 17 remember.
well Please help if you can and what cars should I race that would give me a close race. I mean as in if my car was stock. well plase help.
oh by the way since im not that money balling right now should I leave my car how it is from the outside and leave it as what my friends call a sleeper??????????????????????????????????????????? ?
THNX PPL

if you dont have a header i'd get that first. a custom header (RMF) will give you 20 HP strait up, but its around $800 ; ) aftermarket headers (DC Sports) give you a few ponies, but not anything close to the RMF. you'll spend about $250+ on a decent header. after that i'd get a light wieght flywheel, another $225-ish. underdrive pullies are good too, to free up some hp thats being taken up by the accesories, another $250. after that i'd get some cam gears $175 there. an adjustable fuel pressure regulator, gage and air/fuel ratio gage, $100 for all that, then have your car tuned for street. NGK Iridium spark plugs are an inexpensive touch, coupled with some MSD spark pulg wires...keep the spark hot. so you're looking at $1000+ for a good setup. depending on how much money you've got that might be it for a while : )
as far as the exterior...i'm not a big fan of the huge wing and neon lights...it doesnt make you anyfaster. a fancy body kit is just that: fancy. dont get me wrong, if you trick it out right the prelude looks hot as hell. just dont rice her out ; )