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 ring dimensions is an OEM-quality replacement solution designed for high-mileage engine rebuilds and performance machine work. This complete ring set is specifically engineered for engines with a bore size of 4.085 inches, ensuring optimal fit and blow-by control.

Each piston ring in this set is manufactured to exacting tolerances using premium ductile iron and steel alloys, providing uniform wall thickness and consistent ring pressure. The 1.5mm top ring controls combustion and heat transfer, while the second ring seals compression and regulates oil return. The 2.5mm oil ring effectively manages crankcase oil flow, ensuring a balance between blow-by minimization and reduced friction.

This ring set is ideal for rebuilders and machine shops performing a full engine overhaul, particularly in applications where precise fit and material consistency are critical. Hastings rings are honed and finished to eliminate micro-burrs, allowing for quick seating and complete sealing against bore walls, which directly impacts startup compression and running efficiency.