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The Wiseco 102.286 mm (4.027 in) top piston ring is a Wiseco-spec replacement intended to ensure compression sealing in 4-stroke pistons. Wiseco’s 4-stroke rings are developed and tested for race-ready sealing and oil control; a correct top ring supports consistent combustion sealing and helps maintain piston performance during high-demand usage without introducing unsupported claims.
Wiseco 102.286mm (4.027inch) Top Ring Ring Shelf Stock
