Looks good, now need performance

I have a white 99 4-dr cavi. Just put a keystone spoiler on it; looks great. But now i got the modifacation bug. I'll get the windows tinted this week or next. So now I need to add some performance. I'm already planning on intake and exhaust. Could anyone tell me what gain I can expect from a larger throttle body. Stock is 52mm, i found a 59mm. I don't really know much about FI cars.

not much gain at all really, maybe 5-10 hp if you're lucky, nothing noticable.

FI cars? huh

you mean fuel injected? same as as a carb car, pretty much.