Insomnia

So im getting a lexus is300 from my dad, its an '02 with an AEM short ram intake, aftermarket cat-back with aftermarket muffler, and its dropped 2 1/2 inches with a short shifter 5 speed manual and some sort of upgraded clutch. I was wondering if there are performance chips out there for this car, and any recommended turbo kits. Also any other suggested modifications are welcome, i really want to trick this thing out ;D. thanks