WHAT DOES B16A2 MEAN?

I bought my MRS 3sgte again in 2020. Parker from NW Motor s called me and explained to me I had been getting a a person-of-a-kind, cleanse 3sgte motor. and he didn’t lie. I’ve acquired the pictures to prove it before installation. I have never found a motor this thoroughly clean. Looks like it just arrived off the assembly line.It’s an extend