Perf. Piston Ring Set V8 4.035 Bore 1.5x1.5x3.0

The Perf. Piston Ring Set V8 4.035 Bore 1.5x1.5x3.0 from NPR Piston Rings is engineered for high-performance V8 engines requiring precision ring sets that maintain optimal compression and control blow-by across demanding operating conditions. Whether you're rebuilding a stroker engine, restoring a classic big-block, or upgrading your street machine, quality piston rings are non-negotiable—they seal combustion pressure, regulate oil consumption, and directly impact power output and engine longevity. This ring set is designed for applications where factory specifications demand a 4.035-inch bore diameter, making it ideal for serious enthusiasts and professional rebuilders who refuse to compromise on component quality.

The NPR Performance ring set features a 1.5x1.5x3.0mm ring profile—a proven specification that balances compression ring rigidity with second-ring sealing capability and oil-control effectiveness. The top compression ring carries primary combustion pressure sealing; the second ring manages secondary sealing and blow-by control; and the three-millimeter oil-control ring maintains proper crankcase ventilation while preventing excessive oil consumption. NPR's manufacturing process ensures consistent gap clearances, proper tension profiles, and material consistency across the complete set, critical factors that separate performance-grade rings from budget alternatives. This precision construction minimizes ring flutter at high RPM, reduces friction loss, and maximizes the efficiency gains you've invested in your build.

Engine builders and V8 enthusiasts working with 4.035-inch bore blocks—including late-model big-block Chevys, Fords, and Mopars, as well as custom-bored or stroker applications—rely on NPR ring sets to achieve factory-spec compression and consistent cylinder sealing. Proper installation requires attention to ring gap clearance, bore honing finish, and piston ring groove cleanliness; consult your engine builder's manual for your specific application and bore preparation requirements. With quality ring sets like this, combined with proper machine work and attention to detail, you'll ensure your V8 build delivers reliable performance and the compression numbers your ignition timing and fuel mapping depend on.