All I can say is HOLY CRAP! Coming from a 2000 6.0 vortex this set up is awsome! The truck doesn't even flinch! 70 and sunny about 70 miles from home and 12.2 MPG--NICE! I am grinning!
Anytime now I expect to see the emergence of a counterfiet Duramax LBZ black market. GM only built so many, and it seems the demand for these specimen only grows as the reputation about them gets spread.