Hi there I have a guy that is going to sell me a set of green keys for my 09 3500. He tells me these are the ones that are the same as the aftermarket lift sets, He wants $40.00 for the pair but I just want to make shure that the green keys are the ones for making higher then turning the stock ones up? am I on the right path with this, or are these just stock ones. No point in replacing the old ones with the same thing!!! Thanks guys any help is great, I just figure 40 is better then 250 everone else wants.