Stock 04 rsx type s, suggestions on what mods to install?

i hve a dc5 type s stock n i want to add some mods for more hp n tq but i dont want a fart can for an exhaust so if you kno of any mods like headers intake catback exhaust size of the piping or anything along the lines as this let me kno i do have a spendig limit on this so somethi g that will give me more bang for the buck basically. thanks in advance.