Perf. Piston Ring Set V8 4.160 Bore 1.2x1.2x3.0

The Perf. Piston Ring Set V8 4.160 Bore 1.2x1.2x3.0 is a precision-engineered ring set designed for serious V8 engine builders and performance mechanics who demand OEM-quality compression and oil control. Built to exacting tolerances by NPR Piston Rings, this set addresses the core requirement of any stroker, overbore, or high-performance rebuild: sealing combustion pressure while managing oil consumption. Whether you're freshening a classic small-block or completing a modern performance engine build, proper piston ring selection directly impacts power delivery, fuel economy, and long-term engine durability.

The 1.2mm top ring, 1.2mm second ring, and 3.0mm oil ring configuration is engineered for V8 applications requiring a 4.160-inch bore diameter, providing optimal gas sealing in the combustion chamber while the oil control ring manages cylinder wall lubrication under high RPM and boost conditions. NPR's manufacturing process ensures consistent ring gap clearances, proper face coatings, and ideal radial tension to minimize blow-by while preventing ring sticking or excessive oil consumption. The three-piece design allows independent optimization of compression sealing and oil management, critical for maintaining peak horsepower and protecting cylinder walls during extended driving or competition use.

This ring set suits V8 engine builders working with small-block or performance platform builds in the 4.160-inch bore range, including custom stroker assemblies and displacement-increased applications. Installation requires precise piston-to-bore fitting and correct ring-end gap verification to your specific build specifications; gap should be checked with each ring installed in its bore using a feeler gauge. Compatibility depends on matching both bore diameter and piston design—verify your piston's ring groove dimensions and manufacturer recommendations before purchase. Proper installation with quality ring compressor tools and anti-scuff lubricant ensures reliable sealing and long engine life.