Piston Ring Set 4.466 Classic 2.0 1.5 4.0mm

The Piston Ring Set 4.466 Classic 2.0 1.5 4.0mm (part number CR5750 5) is a complete piston ring kit designed for classic race engine builds with a 4.466-inch bore diameter. Engineered for file-fit installation and featuring plasma moly coating on ductile iron construction, this eight-cylinder piston ring set delivers the precision ring profile required for competitive engine applications where proper combustion seal and blow-by control directly impact horsepower output and engine longevity.

The kit comprises rings with 2.0mm top ring thickness, 1.5mm second ring thickness, and 4.0mm oil ring thickness, paired with standard tension specifications that establish the correct radial pressure for bore contact. Ductile iron material provides wear resistance and thermal stability at high RPM, while the plasma moly surface treatment reduces friction and extends ring life in high-output engines. The file-fit design allows builders to match ring end-gap clearance to their specific bore preparation, a critical step in optimizing compression and minimizing combustion leakage.

This piston ring set is suited for classic race engine builders and street performance enthusiasts preparing eight-cylinder engines where bore diameter matches 4.466 inches. Whether assembling a naturally aspirated race motor, a vintage drag engine, or a high-revving street build, proper ring selection ensures reliable sealing, consistent compression, and predictable engine behavior across the RPM band. File-fit rings demand attention to end-gap measurement and piston groove condition, making them the choice of builders who prioritize precision assembly over universal fit solutions.

Piston ring selection directly influences engine efficiency, oil consumption, and drivability. Classic race-profile rings with moly facing represent a proven specification for small-block and mid-size eight-cylinder applications across street and competition platforms. Builders sourcing replacement ring sets for rebuild or re-ring operations should verify bore diameter and ring groove depth match the 4.466-inch specification before ordering to ensure proper fit and sealing performance.