Perf. Piston Ring Set V8 4.160 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.160 Bore 1.2x1.5x3.0 delivers precision-engineered compression control for high-performance V8 engines requiring exact bore specifications. Built for enthusiasts and professional mechanics rebuilding stroker motors, LS-platform engines, or vintage big-blocks, this NPR piston ring set ensures reliable sealing and optimal blowby control. Whether you're restoring a classic muscle car or upgrading a modern performance platform, proper ring selection is critical to engine longevity and power output.

This performance piston ring set features a 1.2mm top ring, 1.5mm second ring, and 3.0mm oil control ring configuration—a geometry proven to reduce friction while maintaining superior sealing across the full RPM range. The 4.160-inch bore diameter is commonly found in 427 cubic-inch big-block applications and modern billet engine builds targeting maximum displacement and power. NPR's manufacturing process ensures consistent ring tension, precise gap clearances, and chrome or ductile-iron facing to resist scuffing and extend ring life in forced-induction or nitrous-assisted engines.

This ring set is essential for engine builders and mechanics performing complete overhauls, stroker conversions, or block replacement on V8 platforms with 4.160-inch bore dimensions. Proper installation requires careful ring gap measurement, correct piston groove dimensions, and adherence to manufacturer end-gap specifications—typically 0.015–0.025 inches depending on engine type and fuel. Stock this set for customers upgrading cam profiles, adding turbocharging, or building competition engines where original equipment rings cannot withstand elevated cylinder pressures or sustained high-RPM operation.