Piston Ring Set 4.165 5/64 5/64 3/16

The Piston Ring Set 4.165 5/64 5/64 3/16 by Hastings is a premium OEM-quality replacement designed for 8-cylinder engines requiring precise bore fitment and reliable sealing performance. This drop-in piston ring kit addresses the critical function of compressing the air-fuel mixture while preventing blow-by and controlling oil consumption—essential factors for engine longevity and performance. Whether you're rebuilding a classic muscle car engine, restoring a marine powerplant, or servicing heavy-duty industrial equipment, this Hastings ring set delivers the durability and consistency that professional rebuilders and experienced mechanics trust.

Manufactured from plasma-moly coated steel, the Piston Ring Set 4.165 5/64 5/64 3/16 combines standard tension characteristics with advanced surface technology to minimize wear on cylinder walls while maximizing sealing integrity across the full operating range. The ring dimensions—5/64 compression, 5/64 secondary compression, and 3/16 oil control—are precision-engineered to accommodate a 4.165-inch bore, ensuring proper radial and side clearances for optimal gas sealing and minimal friction. Plasma moly plating provides superior corrosion resistance and reduced scuffing compared to standard cast iron, extending ring and bore life while maintaining tight tolerances essential for modern and vintage engine platforms alike.

This eight-cylinder ring kit is ideal for engine builders, machine shops, and owners undertaking full or partial engine overhauls where bore diameter falls within the 4.165-inch specification window. Installation is straightforward for users with basic ring-gapping knowledge; the drop-in design eliminates custom fitting while the standard-tension profile suits naturally aspirated engines across automotive, marine, and industrial applications. Before installation, verify your engine's bore size and consult OEM specifications or your rebuild manual to confirm compatibility—proper ring gap and correct piston-ring installation are critical for seal integrity and preventing catastrophic engine damage.