You got me on that one. It's cracked right across the journal, in a few places. We had it magnafluxed just to be sure. It's a built motor, had JE and Eagle in there. The bores were so bad we had to go to .060", Wiseco makes pistons for that size.
It's not in a Miata, it's some tube-framed thing. I want to say an Excoet, but I'm not sure if that's right.