NPR American V8 Engine Ring Series Piston Ring Set - 4.160 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 20-GNHS4140K8 Includes couplers to fit 3/8"-24

Includes couplers to fit 3/8"-24

then a friend would see it and ask Ken to make one like it

They have 20% more exhaust flow than cast iron Vortec heads

2 Discharge Nozzle

Thunder Series

NPR American V8 Engine Ring Series Piston Ring Set - 4.160 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 20-GNHS4140K8 Includes couplers to fit 3/8"-24Product Description: Piston Rings American V8 Engine Ring Series 4. 160 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