What's everyone's thoughts on re using this piston? All 4 have some light wear marks on the top skirt but not the bottom.
They are bug STI pistons (which I believe are forged).
I've bought a used short motor and I want to re fresh it with new bearings etc. The aim is to run 330 bhp reliably all day long.

 

If you can catch a finger nail in them then no. They're also not forged pistons.