Check my sig and I tow a 12K+ toyhauler in the heat of Az. It runs and pulls great and I can do well keeping egt under 1300*. I would just like to know if there are any economical ways to help even more. The Adrenaline will help cause I don't need as much throttle to get the power I need now. I haven't had a chance to pull any 6% grades yet but on the flats it's working well. Just wanted to know if there were any cheap mods I'm missing. Thanks for any replies.