It was an older stamped rod. Yes, thats what blew up. I think the bottom end let go and spread out. The top of the rod was still intact on the piston, but the bottom of the rod was blown out and the roller bearing could not be found. The rod got between the crank pin and the case. Blew a hole in the side of the case and busted the cylinder lug off that side. Wish I had pictures.