Perf. Piston Ring Set V8 4.010 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.010 Bore 1.2x1.5x3.0 from NPR Piston Rings is designed for V8 engine builders and mechanics who require reliable compression sealing in high-performance applications. This three-piece ring set is specifically engineered for engines bored to 4.010 inches, making it suitable for both street and race engine builds.

The configuration of 1.2 mm for the top ring thickness, 1.5 mm for the second ring thickness, and 3.0 mm for the oil ring thickness is critical for effective sealing against the cylinder wall under combustion pressure. NPR's performance rings are manufactured with precise tolerances to minimize blow-by and maintain proper oil film thickness on cylinder walls, ensuring long-term durability.

This ring set is essential for any V8 engine rebuild with a bore diameter of 4.010 inches, whether restoring a stock long-block or building a high-performance engine. Proper installation requires measuring and gapping the ring end-gap to match your specific piston and cylinder bore, which is crucial to avoid ring binding or excessive blow-by.