Yea I don't think I like it. The cam that is, I have two trucks one with the cam is a 04, the other is a 04.5. I know the turbos, injectors, & pistons are different. Both have 4'' exhaust,6 speed with 3.73 gears & 4x4. one is drw & one is srw. Maybe its the third event on the injectors, I don't know but the 351 on the 04.5 spools just as fast as the 341 on the one with the cam. And it isn't the tuner, I tryed swapping it& it still won't pull as hard before the turbo light. The egt is lower on the cam engine but the stock cam engine would pull the guts out of the street cam engine before the turbos light which was right at 1550 rpm on both before I swapped turbos Injectors & tuners on the drw. But thanks for the info. I do appreciate it. I still have the 341 I pulled off & I have a gt 42 or a brand new hx55 how would those spool?