It will take a lot, if you are looking to buy a built engine I'd suggest getting it from here
http://monkeywrenchracing.com/toyota..._packages.html They make kick ass engines. They have a celica gts at 550whp with only MWR built 2ZZ race engine, MWR stainless manifold and pipes, Garrett GT30R turbo, Large, MWR FMIC, GReddy Type RS BOV, MWR 750cc injectors, MWR 255lph fuel pump, Power FC standalone ECU