I have a CAI, upgraded intercooler, Magnaflo exhuast, Pedal Commander, and upgraded suspension. The truck is definitely faster than stock, so much so that I had to get aftermarket brakes and calipers as well to slow it down quickly enough when throttling it off of the line. And.... I still can't get enough. I want to mod it more, but not so much that it wouldn't be a comfortable daily driver.