i'm gonna tell u what i tell all automatic teg owners. concentrate on your suspension and tires. that way when you upgrade to a manual trans car, you can just swap over the parts.

not to sound like a hater or anything, but you'll totally regret spending any good chunk of money trying to make your car faster. shooot even when i had a 5spd LS, i regretted spending money on things like I/H/E only to gain 2 hp. take your car to an autocross or drivers clinic instead.

a good set of tires (RT615's, NT01's, etc theres a lot of new tires out there that are basically R compound tires for the street) with even the most basic suspension mods (ITR rear sway bar, decent alignment, etc) go a looong way.