| Piston rings, for high compression pistons, Standard size.Additional Information Piston Rings, Standard size. for use only with High compression aluminum pistons that use 5/64” compression and 3/16” oil rings. (NOTE: These are the special rings for use with our pistons, Part# 3021HCSTD.) Questions and Answers To ask a question about this item please press and fill out the form. Customers Who Bought This Item Also Bought | |