if u really want more power save up for faster car or do and engine conversion
in the end u will be more happy
to spend up to 1000 for just a chip which will not suit yr engine 100% because these chips are not tuned to yr engine but as an overall settin for a 4ag
u will not notice much doifference and if u do i think u will not be happy with it
save the money and be happy with what u have at the moment
another thing is toyota spend a shitload of time tunin the factory ecu for best power and economy
i dont know how they get more power with no other mods