The usual mods are easy to get, exhaust, induction, ecu other more in depth mods can be achieved depending on your spend level and wheather your gonna do it your self i.e cams. as for power well that also depends on which engine you go for, i have the 20 Valve one, which is great to drive when you keep the revs between 4500-8000rpm. at 4500rpm the second cam timing changes, which gives it that punch. There is the supercharged version, which i have not had the pleasure of experiancing. there are a couple of other members who have transplanted that engine into there car. i think that Corolla SR and Knowlson have done this, so you should ask them about performance. as for performance for the 20 valve i do not know what the 0-60 time is, but it must be around the 8.0 mark. if you want any more info then just ask mate