Piston Ring Set 4.320 Moly 1/16 1/16 3/16

The Piston Ring Set 4.320 Moly 1/16 1/16 3/16 from JE PISTONS is a premium engine component designed for high-performance applications. This piston ring kit is ideal for builders and engine specialists who require precision file-fit installation and reliability in demanding environments. It is particularly suited for racing and extreme-duty applications.

Manufactured from ductile iron with a plasma moly surface treatment, this ring set features a 4.320-inch bore diameter and a specialized three-piece configuration: 1/16-inch top ring, 1/16-inch second ring, and 3/16-inch oil control ring. The plasma moly coating reduces friction, minimizes blow-by, and extends ring life under high heat and pressure conditions typical of performance engines. The file-fit design ensures a custom fit for precise ring-to-groove clearances, optimizing sealing efficiency.

Engine builders, race teams, and performance enthusiasts will find this ring set beneficial when rebuilding small-block or similar displacement engines where compression and oil control are critical. Careful bore measurement and filing are required for exact clearance fitment, and compatibility with specific engine blocks and piston designs is essential before purchase. This kit can deliver measurable power gains and enhanced durability in competitive settings.