Hastings moly piston ring set is for a 3-5/8 bore and is .020 oversize. Features moly top compression rings with the size of 1/16 and chrome oil rings. Can be used on 1966-1984 FL 1971-1984 FX 1980-1984 FLT 1982-1984 FXR. Sold as a pair for 2 pistons.
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