Think this way,,A larger TB will allow more ar in IF you are restricted there.
Aftermarket makers always tell you that it makes more,. But if you buy all the "stuff" that claims to make more power ,,and you added all the sales talk you might be driving a 1000hp car.. BS please.....
the fastest way I know to screw up a drivable car is larger TB and larger Injectors.
their is very sound reasoning for that statement , but its deeper than what you are asking .. go learn something about tuning then change parts.
OHH and by the way the factory gave you " COLD AIR" it worked great. way better than the crap they are selling in almost EVERY way.
school yourself first, and be very skeptical.