i wonder if anyone has made an individual throttle for their scion. since its a NA car. and you get much more air to the engine.

do a search there are a few threads about this already, here is one to start you off

http://www.scionlife.com/forums/viewtopic.php?t=119788&highlight=itb

hope this helps.

A larger TB doesn't help much so 4 seperate ones would just be overkill IMO.