What's fast to you?
ok, the 3SGE DOES have potential. Since it is an extreme rarity not alot of USDM parts are availble. I've been able to track down a decent number of parts for it. You can make her pretty beefy on top and the bottom is stought enough from the factory to handle nitrous in moderate doses if you choose to go that route. If you are serious about it then do some research OUTSIDE of ToyotaNation and ToyotaCelicas. They aren't going to be much help. Us 3SGE guys are few and far between
Thus far, I've been able to track down full exhausts, intake, cams, cam gears and minor suspension stuff. All the major parts (cams, gears, pistons, etc) will be coming from Japan or New Zealand.
Just look around the net. If you get stuck and CAN'T find anything, hit me up and I'll point you in the right direction. But try to find it out on your own.
EDIT: And do me a favor and keep it off the streets. Street racing is gay and stupid.