How To Make Your 2g Louder..?

I have a 98 Rs..the only performance part i have right now is an apexi n1 exhaust system..i like the sound it makes..but what could you guys suggest I get or do..to make my car sound louder? Thanks

Increase the pipe diameter with some more open headers and use straight pipe with open exhaust muffler or none. I used blue bottles on mine and they are louder than most trucks. Its legal too since the tip is only 3''. But in car parks it sets off car alarms. It costed me $220

if u want loud and high HP, take out the cat-back and then it'll be loud, like those ricers...lol..jus kiddin...