I run the Quad stacked with the SCT with some good results. Tons of people have said I'm wrong but until I get a tune that outperforms the stack I will continue to run it this way. The dang truck is strong but if you take one of the two out of the equation the truck is a dog. I tried to just run the 160 on a trip to Vegas this past weekend and it didn't take long for me to download the SCT and the truck was right where it needed to be!