I need some advise on single turbos for towing. My truck is listed in my signature. I am towing a 12,000 fiver now and I will be getting a heavier one in the future. When I run empty I can keep the TST on 5/5 and the EGT is not a problem. I have the temp set at 1350 on the TST and I get to just below it. When I am pulling the camper I have to be careful at 3/3 on the TST as it will get to the EGT set point. Is there a bolt on turbo that would be worthwhile? I would like to be able to run 6/6 without a load and 4/4 with the camper without the lag being slower than stock. I would like this to be a direct fit, or all the necessary parts included with the turbo.