Ross pistons in great shape. 1 piston has a small scuff on top of it. Very good quality and less than 300 miles on them. $440.00 shipping included lower 48. obo Free floating pins. Pins and rings come with .990 wrist pins 1/16 1/16 3/16 rings 4.350 bore .005 clearance required -27cc dish 11.5 to 1 compression with 65cc head 4.5 stroke 6.8 rod .015 deck clearance Compression height is 1.510 bore size 4.350 block height 10.575 Valve reliefs, 2.300 valve intake 2.000 valve exhaust