I just came back from driving an 08 2500 mega cab 4X4. The dealer in Mission Valley is ordering all of their trucks with 410's for some odd reason. I thought the truck ran like a sports car, the exhaust brake works a ton better than the brake in the 07 which I sold to the kid last week. I thought the new 6 speed auto was great and my only regret is Dodge is still behind about 4 years and don't make a long bed mega--all that being said are all of the new 6. 7's blutec and what the heck does that mean??