One of our TDR members here Greg (Dockboy) has a single turbo F250 excab 4x4 PSD thats over 500RWHP ,and over 600 on nitrous. he is a friend of mine,his truck is incredible,i have ridden in it on #2 only,and its downright insane for a PSD. The thing has run atraction limited 12. 87 at 108mph,spinning all 4 tires past the 60 ft mark,and it weighs 7975 lbs. Like myself he plows snow commercially,and his truck is no joke. There isnt a doubt in my mind that once he gets his stock DT530 injectors worked,and if he does twins he will be well over 600 on diesel only. He isnt even cleaning up the smoke with his nitrous now,doing around 600RWHP,so there's more in there. In all honesty i was never impressed with the PSD at all,until I rode in Greg's truck.