I would like to see dyno's showing a loss with a larger system. Typically, going larger will produce diminishing returns, but I can't imagine an actual loss, especially over stock. Our stock setup is right on the verge of 2" maximum flow capacity, so minow bolt-ons and tune would be on the verge of maxing out 2.25". I have nothing against either, I'm simply curious as to how 2.5" could dyno less than 2.25".
FocusFest 2013: Best of Show
Gateway FFW: Show Class Outstanding
September '13 ROTM
Hatch Nation #161