Piston Rings (590377000001) by Vertex®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials using up-to-date equipment, it ensures everlasting reliability and enduring value. This product is distinguished by total quality assurance, unsurpassed by anybody else.Compression Ratio (x:y): 13.5:1Displacement (cc): 250.00Piston Diameter (mm): 76.94SizeOverStandard: STD