The engine mods are not to obvious other than cold air intake. Like Mike mentioned, our rigs required emission testing/inspection. Most of the performance comes from "software" these days an any emission tampering is kept so discreet that even a dealer tech would have to work hard finding the modifications. You'll like the Amp research running boards. Keep them clean and lubed and you won't have issues.
What kind of lube do you generally use on your Amp steps? Which locations do you find need lube? Best mod I ever added to my truck.
Love the thread, keep posting!

Wife thought that was pretty funny seeing my hop, skip and jumping trying not to fall on my face.