i have a 2000gts, but i'm pretty sure i have heard that if you get an ECU from either a 00, 01, or 03 put in your 02 then it will bump it to the 8200 rpms...as for making it higher, you would have to get a new chip, although i'm not very familiar with the ones for the celica out yet...i think jet has one and i'm not sure if there is a diablo chip, but thats what i would get.