A long shot on an 00, but sometimes clogged cats can give you a hefty power loss too if they are clogged. Woudln't think that would be the case with a truck as new as yours though.

TXsilverado, my basic understanding is that with any type of forced induction the engine wants to breathe, so the cutouts help that, but with a NA engine I am under the same impression you are, performance falls to the floor. Someone will correct me if I am off on this.

Andrew