I have completed the egr delete, air intake, and oil cooler and wanted to see if can tow camper 6500 lbs. I don't have a tuner, lifted 4.5 inches. Won't be long distance or a lot of hills. Truck has 235k miles on it and never any problems with it.

 

Should not be problem. . .i have over200,000 and have towed over 15,000 lbs many times