Piston Ring Set - 4.085 Bore 1.5 1.5 2.5mm

The Hastings Piston Ring Set for 4.085 bore with 1.5 x 1.5 x 2.5mm dimensions is a premium ductile moly-coated ring kit engineered for eight-cylinder engine rebuilds and high-performance applications. This drop-in piston ring set delivers reliable ring sealing without requiring custom fitting, making it an efficient choice for both stock restorations and modified engine builds where superior ring durability is demanded.

The ring package combines plasma moly coating on the compression and intermediate rings with standard tension specifications, which reduces friction and wear while maintaining proper cylinder wall contact across the full stroke. The 4.085-inch bore specification ensures compatibility with engines requiring this precise piston diameter. Hastings rings are manufactured to exacting tolerances, and the moly facing provides superior break-in characteristics while protecting against scuffing during initial start-up and extended high-rpm operation. The steel construction delivers the durability needed in demanding engine environments.

This ring set is ideal for engine builders, restoration shops, and enthusiasts performing eight-cylinder engine rebuilds where OEM-equivalent or premium aftermarket components are required. Whether working on a complete engine overhaul or replacing worn ring sets in existing blocks, the consistent performance of Hastings ring technology supports proper compression, oil control, and long service life. Proper installation in clean cylinders with correct ring end-gap spacing ensures optimal sealing and prevents blow-by.

The 4.085 bore piston ring set with moly coating has become a standard specification in the engine rebuild industry for its balance of cost-effectiveness and proven performance. Hastings' long-standing reputation for precision ring manufacturing makes this an option trusted across professional machine shops and dedicated rebuilders.