Hastings moly piston ring set is for a 3-5/8 bore and is standard size. Features moly top compression rings with the size of 1/16 and chrome oil rings. For installation of 3-5/8 cylinders after spigot holes have been enlarged. (See diagram for photos.) Can be used on 1966-1984 FL 1971-1984 FX 1980-1984 FLT 1982-1984 FXR. Sold as a pair for 2 pistons. *NOTE: All cast iron cylinders have same piston to wall clearance .0025 -.003.
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