Piston Ring Set 4.030 .043 .043 3.0MM

The Piston Ring Set 4.030 .043 .043 3.0MM from JE Pistons is an essential component for engine builders and mechanics performing high-performance rebuilds or top-end refreshes on street and competition engines. This precision ring set is designed for pistons with a 4.030-inch bore diameter, making it compatible with popular small-block platforms and custom engine combinations.

JE Pistons manufactures this ring set with precision-engineered geometry, featuring two compression rings, each with a thickness of .043 inches, and a 3.0MM oil control ring. This design provides optimal sealing across the full combustion cycle, balancing durability and ring flutter resistance at elevated RPM. The 3.0MM oil ring effectively manages crankcase oil return, reducing carbon buildup and extending engine life in both naturally aspirated and forced-induction applications.

This ring set benefits engine builders, performance mechanics, and enthusiasts upgrading 4.030-inch bore engines in small-block configurations, including common Chevrolet, Ford, and other custom applications. By ensuring a precise fit on the piston, these rings contribute to improved engine performance and longevity.