Piston Ring Set 4.625 1/16 1/16 3/16

The Piston Ring Set 4.625 1/16 1/16 3/16 by SEALED POWER is an essential component for engine builders, machine shops, and serious enthusiasts performing top-end rebuilds or stroker engine builds. This precision ring set is engineered to restore proper compression sealing, oil control, and ring blow-by management in engines where factory or worn rings have compromised performance. Whether you're rebuilding a classic small-block, refreshing a performance platform, or assembling a custom long-block, proper piston ring selection is critical to engine longevity and power delivery.

With a bore diameter of 4.625 inches, this ring set features the classic three-ring configuration: two compression rings at 1/16-inch thickness and a 3/16-inch oil control ring. The compression rings (top and second) manage combustion pressure and seal against cylinder walls, while the oil ring prevents excess lubricant from entering the combustion chamber. SEALED POWER rings are manufactured to tight tolerances using premium cast iron and alloy materials that resist scuffing, maintain consistent tension across the ring travel zone, and perform reliably across a wide range of RPM and boost conditions. The tapered and stepped designs optimize gas sealing while reducing friction losses compared to older square-cut designs.

This ring set is ideal for use in 4.625-inch bore engines common in vintage and modern small-block platforms, including select Chevrolet, Ford, and Mopar applications. Proper installation requires careful honing to the specified surface finish (typically 20–40 Ra), correct ring gap measurement and adjustment, and precise ring seating during initial start-up. Engine builders should verify compatibility with piston specifications, ring groove dimensions, and cylinder wall condition before assembly to ensure optimal performance and prevent premature wear or blow-by issues.