What is this?
Apparently, a previous owner had the pan off, but obviously had no business doing so. As Basic said, those are reinforcement plates for the pan mounting flange. They go on the outside of the pan, and no, you don't need to buy new ones.
Maybe the person who did that was reading some instructions that said the plates go below the oil pan, which is correct when the engine is in the car.
But the pan was installed while the engine was on a stand....upside down.
But the pan was installed while the engine was on a stand....upside down.




