Piston Ring Set 4.155 1/16 1/16 1/8

The Sealed Power Piston Ring Set 4.155 1/16 1/16 1/8 (SKU SEAR10202-35) is a precision engine component designed for eight-cylinder engines requiring file-fit piston rings with a 4.155-inch bore diameter. This complete piston ring kit delivers the compression sealing and blow-by control essential for proper engine operation, combustion efficiency, and longevity across both stock and modified engine builds.

Each ring set features Plasma Moly-coated ductile iron construction with standard tension characteristics. The ring stack configuration of 1/16-inch top and second rings paired with a 1/8-inch oil ring is engineered to manage combustion pressures while controlling oil consumption. File-fit rings require precise honing to specification and careful installation to achieve proper ring gap and sealing—a standard approach for performance and restoration applications where exact bore dimensions demand custom fitting. The ductile iron material provides reliable wear resistance, while the Plasma Moly surface treatment enhances anti-scuff properties during engine break-in and sustained operation.

This ring kit is intended for engine rebuilders, performance shops, and experienced enthusiasts undertaking eight-cylinder engine overhauls—whether for stock restoration, racing preparation, or light-duty performance modifications. Proper ring installation, bore honing, and engine break-in procedures are critical to achieving the sealing and durability this kit is designed to deliver. The Sealed Power brand carries established credibility in OEM and aftermarket engine component manufacturing across North America.

File-fit rings remain the standard for precision engine work where bore finish and ring gap must be carefully matched to minimize blow-by and maximize ring life. This piston ring set is part of Sealed Power's comprehensive engine rebuild offering, trusted in professional engine machine shops and by builders who prioritize fit precision and material quality.