ALUMINUM CYLINDER WITH NICKEL-CARBIDE COATING WITH WIDER WATER JACKETS. 12.1:1 69mm HIGH PERFORMANCE MATCHED FORGED PISTON W/MOLY COATING KIT. ATHENA TOP END GASKET SET. This is the entire cylinder no core charge or sleeving required, true bolt on equipment.Check out are other listings for gaskets, big bore hotcams cams, cranks, exhaust and may other of your ATV and bike needs. Get your own map of past buyers.