These cylinders came off an engine that came in for overhaul. Sadly, it only had about 400 hours on it, but had sat alot. I can see where at one point there was corrosion in the bore. They ran the snot out of this the last couple hundred hours all in a few months, but then noticed it was making metal and game over.
These are still good core cylinders, but I would be almost certain they go 0.010" over to clean up. They are std bore now.
No guarantees, I pull these off, and sell them cheap. You are absolutely not getting a ready to go cylinder!