This is the best truck I have ever owned. I have driven many many different trucks and I tell you without a shadow of a doubt this one takes the cake. It comes stock with an exhaust brake. It has plenty of room and more get up and go the it's earlier form the 5.9L. I was messing around with my cousin and we did a pull off with my truck vs his Ford and I drug him through the mud no problem. I love the best in class exterior design. no brick in the wind action like the Chevys. And the best of the best I can pull my 15,000lb trailer (even though it's not recomended) and still get 18mpg.