Perf. Piston Ring Set V8 4.055 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.055 Bore 1.2x1.5x3.0 from NPR Piston Rings is engineered for serious engine builders and mechanics performing high-performance V8 rebuilds. This premium ring set is designed for large-displacement engines requiring precise bore dimensions and optimal compression sealing. Whether you're rebuilding a street performance engine, preparing a race application, or restoring a classic V8, these rings deliver the reliability and sealing integrity that separates quality machine work from mediocre results.

Built with NPR's proven metallurgy and precision manufacturing, the 1.2x1.5x3.0 ring profile provides superior blow-by control and minimal friction loss during both cold starts and sustained high-RPM operation. The three-ring configuration includes compression and oil control rings optimized for the 4.055-inch bore specification, ensuring consistent wall contact and reduced wear rates. Modern coatings and gap clearance engineering minimize detonation sensitivity while maximizing longevity under boost or nitrous applications, making these rings suitable for naturally aspirated or forced-induction platforms.

These rings are ideal for anyone machine-honing a 4.055-inch bore and require OEM-quality or better sealing characteristics. Installation demands proper ring gap verification, hone surface preparation, and piston-to-wall clearance confirmation before assembly. Compatible with any V8 engine machined to 4.055-inch specifications, this set represents the engineered precision that separates amateur rebuilds from professional-grade work. Proper installation procedure and hone finish quality directly impact performance; follow manufacturer specifications for gap and clearance to achieve maximum efficiency gains.