I guess so. I walked in and he said "You must have around 100k on these". 94k it is. He was showing me on the spring, that OEM have varying size individual leafs. The top where a little thicker than the middles, which were a little thinner than the bottems. He said he sees it offen, just from the design of the spring.
The new springs are all the same thickness, which makes em over a 1/2" overall thickness than the OEM unit.
This shop was strictly leaf springs, from top to bottem.
Seemed to know his shite.