Yes the 6112 is a huge improvement over the 5100. It has a 2.5" body and a 7/8" shock shaft. They ride much smoother than the 5100. There are a couple huge threads on the 6112's that have a lot of the technical info. I saw a cutaway view of them somewhere also. Do a search and you will find it.
This is all great information, but I still have a question, I bought my Tundra with a 4" lift kit on it (I don't know the brand), if I were to buy the 6112's would it interfere with the lift? I don't know hardly anything about the suspensions in vehicles
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