It probably doesn't need one but I like to gear down manually coming to a stop and that tends to suck more stuff into your intake from the crankcase. Besides, she's new and I want to play with her some. Toyota did such a thou rough job in design there isn't much else to do for improvement.
I put one on my 06 GTO and it caught more oil than you might imagine.
Ill look on eboy. Just wondered if one was better than the other.