Perf. Piston Ring Set V8 4.155 Bore 1.5x1.5x3.0

The Perf. Piston Ring Set V8 4.155 Bore 1.5x1.5x3.0 from NPR Piston Rings is engineered for high-performance V8 engines requiring precision ring geometry and superior sealing capability. Whether you're rebuilding a stroker engine, restoring a classic muscle car, or upgrading a performance build, this ring set delivers the compression and blow-by control needed for reliable power delivery. These rings are designed to handle elevated boost pressures, extended RPM ranges, and demanding driving conditions that standard OEM rings cannot sustain.

NPR's performance-grade ring set features a three-piece configuration with a 1.5mm top ring, 1.5mm second ring, and 3.0mm oil control ring—a geometry optimized for maximum compression retention and minimal friction across the piston skirt. The 4.155-inch bore specification ensures precise fitment in larger-displacement engines, critical for maintaining the tight tolerances that prevent excessive blow-by and oil consumption. These rings are typically manufactured from high-quality ductile iron or steel with advanced surface coatings, allowing them to withstand sustained high heat and combustion pressures while maintaining excellent ring-to-wall conformability and wear resistance over extended engine life.

This piston ring set is ideal for V8 engine builders, machine shops, and enthusiasts tackling full-stroke builds, turbo or supercharged applications, and race-oriented platforms where stock compression ratios are insufficient. Verify bore size and ring groove depth on your piston before purchase to ensure proper installation clearance. Compatible with most modern V8 blocks and performance pistons designed for the 4.155-inch bore diameter—always confirm OEM specifications and consult your engine builder or machine shop for proper ring gap and installation procedures.