Rings are .064 .064 .218 the top ring is .200 down second is .150 from that and the oil ring is .085 down from that. Int pocket is .265, exh pocket is .245 both 15 degrees. They are J&E custom flat tops and the job number is 499577, piston part number is #241700, the bore is 4.498 cd is 1.06,.990 x 2.93 pins, 514 grams.