Perf. Piston Ring Set V8 4.130 Bore 1.5x1.5x3.0

The NPR Performance Piston Ring Set V8 4.130 Bore 1.5x1.5x3.0 is engineered for serious engine builders and performance enthusiasts seeking reliable ring seal and blow-by control in high-displacement V8 applications. This ring set is purpose-built for engines with a 4.130-inch bore diameter, making it ideal for stroker builds, racing engines, and heavily modified platforms that demand precision-fitted compression and oil control rings. Whether you're assembling a competition engine or rebuilding a street performance V8, quality piston rings are non-negotiable—they directly affect compression ratio, power output, fuel economy, and engine longevity.

NPR piston rings are manufactured to tight tolerances and designed with a three-piece ring pack configuration: two compression rings (1.5mm and 1.5mm) and one oil control ring (3.0mm). This geometry optimizes sealing during the power stroke while minimizing friction and allowing efficient oil return to the pan. The 4.130-inch bore specification ensures a precise fit in modern big-block and stroker applications, preventing ring flutter and side clearance issues that compromise performance. NPR's material composition provides excellent heat resistance and durability under sustained high RPM and high boost conditions, critical for forced induction setups and sustained track duty.

This piston ring set benefits engine builders working on big-block Chevys, Fords, Mopars, and modern LS-based stroker platforms where a 4.130-inch bore is standard. Installation requires precise ring end-gap filing and correct positioning in the grooves to maximize compression seal and oil control—improper installation will result in blow-by and power loss. Always measure your bore diameter before ordering and verify that your pistons accept this ring set specification. For engines running nitrous, superchargers, or turbochargers, quality rings like this NPR set are essential for holding boost and maintaining peak cylinder pressure.