NPR American V8 Engine Ring Series Piston Ring Set - 4.155 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder Pulley Kit and many other world class

and many other world class races

and is offered in two sizes to accommodate any size rider

and the dividers are pulled back to increase plenum size and shorten the runners for improved high rpm performance

1979-1979 Buick Regal

NPR American V8 Engine Ring Series Piston Ring Set - 4.155 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder Pulley Kit and many other world classProduct Description: Piston Rings American V8 Engine Ring Series 4. 155 in Bore 1. 2 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