How can I make my truck louder for very little money?

[AaronBoros]

I'm 17 without a job and I have a truck that I would like to make louder for very little money and leagal.

 

[WahidShaar1]

Put a hole in the exhaust, it'll be really loud!
I did it once to my dad's old grand prix, it sounded like godzilla farting.

 

[JanValenci]

dont be a douche