I dont think the 2.4 TB does a bunch unless you are cammed, and even then I don't think its much. Peak HP numbers are useless, look under the curve if you wanna see actual improvements.
I'm also thinking about getting a 2.4 throttle body and maifold. There is only one problem i'm not tuned yet but i want to be trifecta tuned my next question is how does it react without a tune?
just with an intake i get 100-150 mi more per tank and it took the lag outta my throttle response so if u add the 2.4l manifold only good things can happen