Perf. Piston Ring Set V8 4.160 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.160 Bore 1.2x1.5x3.0 is a precision-engineered ring set designed for high-performance V8 engines requiring exact bore specifications. Built to restore compression and oil control in rebuilt engines or upgrade stock assemblies, this NPR piston ring set delivers the repeatability and durability that serious engine builders and mechanics demand. Whether you're refreshing a tired engine block or assembling a performance build, proper piston ring selection is non-negotiable for peak cylinder pressure and longevity.

This ring set features a three-piece configuration with 1.2mm top ring, 1.5mm second ring, and 3.0mm oil ring thicknesses—a geometry optimized for modern combustion dynamics and thermal stress. The 4.160-inch bore diameter accommodates popular big-block and small-block V8 variants, ensuring tight piston-to-wall clearance and minimal blowby. NPR's manufacturing process maintains strict roundness and surface finish tolerances, critical for even loading and consistent sealing across the ring face. The complete set weighs just 0.75 lbs, typical for aluminum piston assemblies, and comes ready to install with no additional machining.

Mechanics and engine builders choose this ring set for stock rebuilds, race engine assembly, and high-mileage engine restorations where OEM specifications must be met precisely. Installation requires careful ring gap setting and proper honing to achieve the manufacturer's recommended clearances—a critical step that separates a long-lived rebuild from premature failure. Before ordering, verify your engine's exact bore diameter and confirm compatibility with your piston set; the 4.160-inch specification will fit specific Chevrolet, Ford, and other V8 platforms but must match your pistons exactly. Proper ring end-gap installation prevents ring flutter and excessive wear, directly impacting oil consumption and blowby rates.