Am I stupid? I still don't see how it keeps it from going into the exhaust port. It's still got a gap.
Pistons are tough, they expand so much and take so much force, I saw Alex doing this and it just seems like such a fringe solution. You're adding weight and introducing a major point of failure. If you mic out a basic kit piston it's such a crazy shape, I dunno how you're going to machine a thread interface that is going to maintain the correct contact and strength across 400 degrees and insane forces. You see this stuff and it looks cool, maybe it will survive one or two runs at bonneville.