This weekend I installed a Volant cold air intake. Immediately upon starting the truck I could tell it was there. The sound of sucking air was pretty cool and you could tell the engine could breathe. A quick test drive and I was glad I made the purchase. The truck comes alive when hitting the throttle. I have notice it doesn't take as much throttle to maintain the same speed as before on the interstate. Haven't had it long enough to tell about gas mielage but any gain is icying on the ake for me.