Perf. Piston Ring Set V8 4.020 Bore 1.5x1.5x3.0

The Perf. Piston Ring Set V8 4.020 Bore 1.5x1.5x3.0 is a high-performance ring package engineered for V8 engines requiring precision bore sizing and optimal compression sealing. This NPR piston ring set is built for builders and mechanics tackling engine rebuilds, stroker builds, and performance restorations where OEM replacements fall short. Whether you're refreshing a tired long-block or assembling a custom powerplant, quality ring sets are non-negotiable—they directly control blowby, compression retention, and oil consumption across the entire RPM band.

NPR rings are manufactured to strict tolerances and material specifications that maximize ring-to-bore contact and minimize wear. The 1.5x1.5x3.0 ring thickness configuration—representing the top, second, and oil ring thicknesses—balances radial pressure distribution for controlled combustion sealing without excessive friction or bore distress. The 4.020-inch bore sizing accommodates bored-over or large-displacement engine applications, and NPR's proven coating and hardness treatments resist scuffing during break-in and sustain performance under sustained load. Proper ring gap clearance and correct installation in a honed bore are critical to realizing these rings' full sealing and longevity potential.

This ring set suits V8 platforms undergoing serious engine work—LS conversions, big-block strokers, vintage muscle car restorations, and small-block performance upgrades all benefit from matched, quality ring geometry. Ensure your block is properly honed to NPR specifications, check ring gaps against manufacturer tables for your intended bore finish, and install with care to avoid breakage. Verify 4.020-inch bore compatibility before purchase, as piston and ring sizing is application-specific and cannot be easily reversed once the engine is assembled.