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 engineered for serious V8 engine builders and mechanics seeking reliable compression sealing in high-performance applications. This three-piece ring set is designed for engines bored to 4.010 inches, a common size in both street and race engine builds. Whether you're rebuilding a big-block Chevy, Ford 427, or custom engine platform, quality piston rings are non-negotiable for cylinder sealing, oil control, and long-term engine durability.

The 1.2x1.5x3.0 configuration specifies the compression ring thickness (top ring), second ring thickness, and oil ring thickness in millimeters—a critical specification that determines how effectively each ring seats against the cylinder wall under combustion pressure. NPR's performance rings feature precise manufacturing tolerances and ring gap design that minimize blow-by while maintaining proper oil film thickness on cylinder walls. The three-piece setup delivers superior compression retention compared to single-piece designs, particularly under boost or high-RPM conditions where ring flutter and gas leakage become concerns.

This ring set is essential for any V8 engine rebuild where bore diameter reaches 4.010 inches—whether you're restoring a stock long-block or assembling a stroker or big-displacement platform. Installation requires proper ring end-gap measurement and gapping to your specific piston and cylinder bore to avoid ring binding or excessive blow-by. Mechanics and engine builders rely on NPR rings for cost-effective performance without compromise, making this set ideal for both amateur restorations and professional racing engine work.