Perf. Piston Ring Set V8 4.160 Bore 1.5x1.5x3.0

The NPR Performance Piston Ring Set V8 4.160 Bore 1.5x1.5x3.0 is engineered for serious engine builders and mechanics seeking reliable ring performance in American V8 applications. Whether you're rebuilding a stock engine, restoring a classic, or refreshing cylinder walls after machine work, this eight-cylinder ring kit delivers the compression seal and durability required for trouble-free operation. NPR's American V8 Engine Ring Series sets the standard for aftermarket piston ring quality, and this 4.160-inch bore specification fits a wide range of displacement and platform combinations across domestic V8 engines.

This ring set features a 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring configuration—a proven geometry that balances blowby control with minimal friction loss. The nitride surface treatment enhances hardness and wear resistance, critical for long-term cylinder wall compatibility and consistent compression retention across heat cycles. Standard tension rings provide predictable seating during the critical break-in period while maintaining proper gas sealing without excessive side loads on the piston skirt. The steel construction combined with precision manufacturing ensures dimensional consistency across all eight cylinders, eliminating the weak-link failures that can occur with inferior ring sets.

This ring set is ideal for owners and rebuilders working with big-block and small-block V8 platforms that use 4.160-inch bore specifications. Professional engine shops rely on NPR rings for customer builds because they eliminate comebacks related to compression loss, oil consumption, or blow-by issues. Installation is straightforward during full engine rebuilds—ring gaps should be checked and set to manufacturer specifications, and cylinders must be properly honed to the appropriate surface finish for optimal ring seating. For anyone serious about engine reliability and performance, the Perf. Piston Ring Set V8 4.160 Bore 1.5x1.5x3.0 represents the value-to-quality ratio that keeps engines running strong.