Testing on other intakes indicate not much for gains in HP until you get above the 500hp range in your engine. And then not until you get into the higher RPM ranges. If anything it may help lower IAT but IMO it ain't worth it for a DD.
I'm running it, I also am somewhere just over 500 at the wheels. My only problem is it hits the hood and doesnt allow it to close by about 3/16-1/4 inch in pass side, anyone have this problem or a fix?