So back in 2019 I bought a set of leaf springs from NPD. I dug them out and I did my thing to them and later when I was done I had them side by side and I noticed one was a bit longer and flatter, I took pictures and sent them to Eaton and with the measurements. they called me and after some more pictures they sent me a new set. They are having the mismatched set picked up on Monday. They were great to work with. A few picks.