$1000.... i would say nitrous Best bang for your bucks. If you get cams and IM it will be over $1000 because you cant just put it on and be done with it if you want the most out of your mods.

For $200-300 for a nitrous kit...you can gain anywhere from 50-75hp on pump gas the street.



EDIT: Sorry guys...forgot this was a ALL MOTOR forum LOL.... If you want all motor go with the basic bolt ons Header, Exhaust, Intake manifold, Throttle body, cams, etc.