I'm finally feeling dialed in with my 6112/5160 setup on my '15 TEP. All my parts came in at separate times and I installed them as they came in.
In First, the 6112's on the second clip. I went from 34" both sides to 35.5" and it eventually settled a bit to about 35.25". BTW- the truck's ass end felt really squishy and un-balanced without the 5160's installed. I was not initially impressed with the 6112 and factory rear shock/spring.
The ride height change was barely noticeable and I wasn't really feeling how the ass end sagged with any kind of weight.
Next, Cooper AT3 255/75/17's and debated between 1" or 1.5" spacer or 2" spring.
Next, installed the 5160's. What a difference in ride quality. Finally a balanced suspension. As documented, a minimal to no change in ride height.
After setting it up on the lift and figuring out how often I'll be driving with my trunk loaded (trailer hitch bike rack and bike, dog, work gear, fishing gear, etc) I decided to go for the springs. Much thanks to [MENTION=117446]CSix[/MENTION] and [MENTION=109458]letzrace[/MENTION] for their recommendations. I was pretty set on the 3rd clip in the front gaining only 2", but I was nervous to go with such a forward rake. That said I really wanted to see how the springs could improve the ride over factory and spacers.
So, springs installed and 6112's changed to 3rd clip...
After about a week riding around with a loaded down trunk, the springs have settled some and I'm now at 36" front and about 38 1/2" in the rear. The ride quality with springs is great and I'm very happy going that route.
If you are looking for a more leveled look and wanting to stay under 3", I would recommend the 4th clip in the front and the 2" springs. I may do this in the future, but I need to research a bit more on how that will affect the KDSS. I'm hearing multiple opinions on that.
Sorry for the ramble. Cheers!
PS...thanks for all the tutorials, setup recommendations and suggestions on here. I basically incorporated all of them in some form or fashion.