NPR American V8 Engine Ring Series Piston Ring Set - 4.125 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder ALL22122 5/8 in Rim Hole

5/8 in Rim Hole

2:1 improvement over "points" in current fall time for increased coil output

they are widely used in Pro Stock and Competition Eliminator

Mechanical Speed Sensor

1965-1975 Pontiac Grand Prix

NPR American V8 Engine Ring Series Piston Ring Set - 4.125 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder ALL22122 5/8 in Rim HoleProduct Description: Piston Rings American V8 Engine Ring Series 4. 125 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