I haven't dynoed my truck since spring of '06 and at that time i just had intake, exhaust, SCT(Innovative extreme tunes), and water injection. At that time it put down 435hp with the water...didn't try it without the water so not really sure how much i really gained with it. I would like to think with whats done to the truck now that it would be close to 550hp, but can't really say until i dyno it again...have been really anxious to dyno it again and find out. I don't drive my truck everyday...put on less than 100 miles a week and it sits during the winter. It's just a play toy kinda more or less.