Piston Ring Set 4.030 1/16 1/16 3.0mm

The Hastings Piston Ring Set 4.030 1/16 1/16 3.0mm (SKU: HAS2M5538030) is a premium ductile iron piston ring kit engineered for eight-cylinder engine rebuilds and high-performance applications. Featuring low-tension design with plasma-moly coating, this complete piston ring set delivers the compression seal, blow-by control, and oil management required for extended engine life and consistent power output across demanding operating conditions.

The 4.030-inch bore sizing with 1/16-inch top and second ring thickness and 3.0mm oil ring thickness represents a direct-fit specification for engines in this displacement class. The ductile iron construction combined with plasma-moly surface treatment provides superior wear resistance, reduced friction, and improved ring-wall conformity—critical factors that minimize blowby and stabilize compression. The low-tension design reduces drag on the crankshaft while maintaining effective sealing, allowing engine builders to achieve better fuel efficiency and smoother operation without sacrificing reliability.

This ring set is ideal for engine rebuilders, performance shops, and mechanics restoring eight-cylinder engines to original specifications or upgrading to OEM-quality components. Whether completing a stock engine rebuild, addressing worn compression, or establishing baseline performance after machining, the Hastings piston ring set provides a proven drop-in solution that meets stringent OE standards. The complete kit format eliminates the need for multiple purchases and ensures matched ring geometry across all cylinders.

Hastings has established itself as a trusted manufacturer of engine gaskets and sealing components for both domestic and import applications. Piston rings are critical internal engine components; proper fitment and surface quality directly affect compression ratio, oil consumption, and long-term durability. Specification-matched ring sets like this one ensure that all cylinders perform identically, preventing compression leaks and uneven combustion that lead to power loss and increased emissions.