there is a bolt-on supercharger for the celica with the 5sfe from 92-99
so far the system has gotten good reviews and is a prety easy system to use
it has been featured on speed channel during "spike tv" or what not
some of you might have seen it...its produced by ripp mods performance out in cali.

www.rippmods.com

Welcome to last year!! haha >>

It seems to be a pretty decent system. I would buy one if I had a GT. But I would do something different for engine management. I'm not real fond of things called a 'black box'. I don't like to buy things if they won't tell me how/why/what they work.