Piston Ring Set 4.355 Moly 1/16 1/16 3/16

The Piston Ring Set 4.355 Moly 1/16 1/16 3/16 by JE Pistons is engineered for high-performance and competition engines where ring durability and blow-by control are mission-critical. Designed for precision-built small-block applications, this ring set is favored by engine builders, race teams, and technicians who demand repeatability and reliability under extreme combustion pressures. Whether you're assembling a dedicated competition platform or rebuilding a high-output street engine, this JE Pistons ring set delivers the sealing integrity and thermal stability that separates functional builds from championship-level powerplants.

This ring set features a moly (molybdenum) face coating on the compression rings, a proven material choice that reduces friction, improves ring-to-wall conformity, and extends ring life under sustained high-RPM operation. The 1/16-inch top ring and second ring, paired with a 3/16-inch oil control ring, provide optimal balance between sealing performance and reciprocating mass—critical for engines operating beyond 7,500 RPM. Moly coating excels in scenarios where traditional chrome plating falls short: it handles abrupt load transitions, resists scuffing during cold starts, and maintains consistent oil film strength across extended heat cycles. JE Pistons manufactures to tight tolerances, ensuring each ring in the set meets bore specifications for the 4.355-inch bore diameter.

This ring set is compatible with JE Pistons forged piston kits and most aftermarket small-block engine platforms that accept 4.355-inch bore dimensions. Installation requires precision honing to JE's recommended surface finish and bore specifications; improper bore preparation will compromise ring performance and durability. Verify your engine block bore diameter and piston design before ordering—ring set compatibility is bore-specific and non-returnable once opened. For maximum longevity, pair with quality engine oil, proper ring gap clearance, and an appropriate break-in procedure that respects the moly coating's initial bedding requirements.