Underdrive pully's, Rear Sway Bar (it really makes a difference, and yes, ford did cut out rear sway on 99+ v6's). If you're into lower cars, I'd definately say that. I would but my dad says he'll stop paying my car insurance if i do.....and while im in college i'm dependant on that. lol. You could also consider what i'm planning on doing...mounting my radio antenna in the front fender well, then having a body shop smooth over that place where it sticks up, for a cleaner look. But i'd do the preformance mods first. But hell if you have a grand, do 'em all -Chris