Duramaxs dont like no more then 600 hp on stock bottom ends. The heat from timing and cyl pressure from larger turbos take a toll on these motors after 600 hp. Usally u may be fine with a large single keep the timing down and do not run dual fullers. But why take that risk. If u have anymore questions fill free to Pm me. We can talk there or i can give u my Number 
Kurt
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Snow flake 2004.5 D/A Efi live, PPE lift pump, 35inch mudders and a florida stack
Team Salad 1 and only 2wd sled puller
13.20@115 mph
I am sorry that i can not make it to threads in times. If u are having a problem and need help pm me and i will get to u ASAP |