I want to thank Tim and his awesome coolertubz... There 3" IC tubes and like a arch flow manifold that goes into the head... Man what a differance it made in "my" truck. Even my wife was like wow!!! when she drove it. I let my buddy that drove it when I first, first got it "stock" and didn't say anything and he got on it to pull into the road and was like what have you done?! I said you know me, he laughed and said I thought you were going to leave this one alone. I said I know that's what I said, but I can't help myself. Thanks again TWorline, they are awesome!!! Besides my pin, best money I've spent...