Same here, but they were the performance bearings. I checked the King catalog, and the numbers on these bearings correspond with what the catalog shows, non grooved lowers on 2 and 4. I initially had them out of order, because from a performance stand point number 2 seems to starve for oil quicker than the others, so I put the grooved bearing there. That was with the assumption the bearings were mixed up. After checking the catalog, I see it was intentional.
