i just got the hooker aero chamber catback exhaust. if your looking for an aggressive sound for the best bank for the buck, i think this would be it. what you can also get is le1 or 2 heads and cam for around that price range i think, you have to look it up. i would also go gears, many choose 3.73 for street and 4.10 for strip. Air intake is another mod you can do. if you do heads and cam, that will most likely take all your money. you can prolly get everything else in one pile for that money