truck intake

Im trying to stick with the truck intake if i can just to keep the motor more stock looking and a lil more sneaky lol, but if the current truck intake wont do the job ill have to change it.
Anyways, for the guys still using the truck intake, at what rpm does your power start to level off? or if anyone just knows when it becomes a restriction??
With my ls6 cam it peaks hp at 5500 rpm and basically stays flat from there to 6200.


