I have a 02 chevy 2500 hd cc/sb with a 6.0l. I have a nelson tune, cai, flowmaster. I am very happy with the truck for what i have done to it so far. It gets 16+ on the highway in which I am very happy with. It has pulled my enclosed snowmobile trailer very well but, I now have a good sized fifth wheel trailer in which it brings the ole' 6L to her knee's. I am thinking of putting a cam in. What would be my best option. Thanks