Piston Ring Set 4.030 1.2 1.2 3.0mm

The Hastings Piston Ring Set 4.030 1.2 1.2 3.0mm (SKU: HASSN9045035) is a premium ductile and steel series engine rebuild component engineered for 8-cylinder applications. Manufactured to file-fit specifications, this piston ring kit delivers the precision tolerances and material durability required for both stock restoration and performance engine builds. The 4.030-inch bore size positions this ring set for mid-displacement engines commonly found in classic and modern automotive applications where reliable ring sealing is critical to combustion efficiency and engine longevity.

The 1.2 x 1.2 x 3.0mm thickness configuration with standard tension characteristics provides the optimal balance between ring compliance and sealing force. Hastings' gas nitrided stainless steel construction resists oxidation, corrosion, and thermal degradation under sustained combustion cycles, extending ring life and maintaining consistent compression across the piston ring set's service interval. The stainless steel material selection particularly benefits engines exposed to ethanol-blended fuels or high-humidity storage conditions, where conventional iron rings are prone to rust and accelerated wear. File-fit piston rings require final honing to achieve the precise clearances specified for your specific engine block, making them the choice for custom machine shops and experienced rebuilders who demand exact tolerances.

This ring set is ideal for engine builders, restoration specialists, and performance shops executing complete piston and ring assemblies on 8-cylinder engines within the 4.030-inch bore specification. Whether rebuilding a classic muscle car engine, restoring a truck block, or assembling a race engine, the Hastings piston ring set delivers the compression sealing reliability required for cold starts, idle stability, and sustained power delivery. Proper installation requires precision honing, ring gap measurement, and careful piston-to-bore fit verification to ensure optimal performance and longevity.