Piston Ring Set 4.160 5/64 5/64 3/16

The Hastings Piston Ring Set 4.160 5/64 5/64 3/16 (SKU: HAS2M644040) is a complete ring kit engineered for eight-cylinder engines requiring precision bore sizing and standard tension compression. This drop-in piston ring set delivers consistent ring-to-bore sealing across the full operating temperature range, maintaining combustion pressure integrity and minimizing blowby in both stock and moderately modified engines.

Each ring is manufactured from steel with a plasma moly coating, a process that reduces friction at the ring face and ring groove while extending ring life under sustained heat and load cycles. The 4.160-inch bore diameter accommodates a broad range of small-block and big-block applications. The 5/64-inch compression ring thickness, paired with 5/64-inch secondary ring thickness and 3/16-inch oil control ring thickness, provides the OEM-correct geometry needed for proper sealing and gas blow-by control without requiring machine work or custom fitting. Standard tension specification means these rings are calibrated for stock-level ring gap clearances and spring load, making them a straightforward replacement for original equipment rings or a reliable upgrade path for rebuilt engines.

This piston ring set is designed for engine builders, machine shops, and enthusiasts performing complete engine overhauls or rebuilds where bore size and ring specification matching are critical to long-term durability. The plasma moly treatment is particularly valuable in high-mileage rebuilds or engines that see sustained highway driving, where ring durability directly impacts oil consumption and compression retention. Hastings rings are a recognized choice in the engine rebuilding supply chain, known for consistent dimensional accuracy and reliable performance across OEM and performance applications.