Perf. Piston Ring Set V8 4.070 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.070 Bore 1.2x1.5x3.0 is engineered for serious engine builders and performance enthusiasts looking to rebuild or refresh high-displacement V8 powerplants. These NPR piston rings are designed specifically for large-bore applications where maintaining proper compression, controlling blow-by, and extending ring life are critical to engine reliability and power output.

This piston ring set features a three-piece configuration with 1.2mm top ring, 1.5mm second ring, and 3.0mm oil ring dimensions—a proven geometry that balances compression retention with durability in high-RPM and high-boost environments. The 4.070-inch bore specification fits popular big-block and large-displacement small-block applications, ensuring precise piston-to-wall clearance and minimizing excessive wear or friction.

Performance engine builders and rebuild shops rely on NPR piston rings for both naturally aspirated and forced-induction applications, from vintage drag racing platforms to modern crate engines. With consistent ring gap tolerances and surface finishes, this set maximizes gas sealing, directly translating to better throttle response, improved fuel economy, and reduced oil consumption.