i personally have never been one to trust someone else to work on my vehicles and when i bought i 6.4 i was somewhat forced to. i let the dealership install a new hpfp, since the truck is completely stock and i didnt have the spare time to do it. well about two days after i get the truck back i noticed some smoke coming out of my wheelwell and it smelled like exhaust. i was in a hurry so i opened the hood kinda glanced it over and didnt notice anything, and didnt notice anymore smoke for about a week and when it happened this time i had my one year old son in the truck and the smoke came through the vents. i was doing 70 when it happened so i shut it down as fast as i could and immediately popped the hood and began inspecting everything. turns out the tech at the dealership didnt tight the clamp that hold the exhaust line on the turbo. so i decided to tear everything apart MYSELF and see what else he didnt do. i also found 2 fuel lines lose and leaking fuel. so needless to say i'm pissed!