NPR American V8 Engine Ring Series Piston Ring Set - 4.020 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 1210-509 and pockets

and pockets

25 in Length x 6

The included valve body components in this kit are designed to provide substantial gains in friction plate durability

but on the dyno NX systems make more horsepower per pound of nitrous than anyone

Designed specifically for EFI

NPR American V8 Engine Ring Series Piston Ring Set - 4.020 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 1210-509 and pocketsProduct Description: Piston Rings American V8 Engine Ring Series 4. 020 in Bore 1. 5 x 1. 5 x 3. 0 mm Thick Standard Tension Steel Nitride 8 Cylinder NPR Piston Rings is a world leader in the production of piston rings. A long time supplier for OEM applications, they also produce a line of performance piston rings designed for top tier performance and reliability. With performance piston rings for a wide range of engines, including popular V8's from