Perf. Piston Ring Set V8 4.080 Bore 1.5x1.5x3.0

The Perf. Piston Ring Set V8 4.080 Bore 1.5x1.5x3.0 delivers OEM-grade compression and oil control for serious V8 rebuilds and high-performance engine builds. NPR piston rings are engineered for engines demanding reliability under sustained boost, nitrous, or naturally aspirated power output. Whether you're restoring a street engine or preparing a track-ready big-block, this ring set maintains critical ring-to-bore clearances and sealing integrity across the entire RPM spectrum.

This three-piece ring set features premium compression ring geometry (1.5mm top ring, 1.5mm second ring, and 3.0mm oil control ring) specifically designed for the 4.080-inch bore diameter common in late-model and stroker small-block and big-block V8 applications. The NPR manufacturing process ensures consistent ring face finish, proper side clearance, and gap uniformity—critical factors for blow-by reduction and oil consumption control. Cast-iron construction with advanced coating technology resists scuffing and provides superior durability against modern fuel blends and extended drain intervals.

Engine builders and mechanics rely on NPR rings for naturally aspirated, carbureted, fuel-injected, and forced-induction V8 engines rated from 400 to 600+ cubic inches. Installation requires proper ring end-gap filing to exact specifications for your bore diameter and ring groove depth—standard practice for any serious performance rebuild. These rings deliver measurable improvements in compression ratio maintenance, combustion efficiency, and oil film retention compared to worn OEM rings or budget aftermarket alternatives.