call me nuts, but i have a horse power dream.....

[Toyota Fan]

There really is no cost effective way to make a stock supra 500 HP best thing you can do is a turbo engine and tranny swap but even then its not much more HP around 230 K&N Horse power kit will give it about 10-22 HP changing the cam gears and shaft will give a bit more and the exaust will also go to a shop and have them chip your ecu better spark plugs thats pretty much the basic the rest will cost you an arm and a leg. If you got the money I would do a 2.5 2jz swap first thing but its a ton of work then do all the stuff I said and ask a local mod shop for advice.