Are there any real-world benefits to a CAI or is it mostly cosmetic? When I was in there adding HIDs the filter box assembly snorkels out of the engine bay, so they kind of already are "cold-air" intakes. Unless the filters and pipes are narrower and more restrictive on the stock assembly, I can't imagine any gains other than cosmetic, but I'm new to pickups so maybe you guys have actual dyno runs etc to support them...