NPR American V8 Engine Ring Series Piston Ring Set - 4.020 in Bore - 1.2 x 1.2 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder AA0810AF2X57 Nylon/PTFE

Nylon/PTFE

but the original concept remains the same

They also offer items like side pipe kits

Prevents gelling and corrosion in methanol and nitromethane fuel systems

Boost sensitive design

NPR American V8 Engine Ring Series Piston Ring Set - 4.020 in Bore - 1.2 x 1.2 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder AA0810AF2X57 Nylon/PTFEProduct Description: Piston Rings American V8 Engine Ring Series 4. 020 in Bore 1. 2 x 1. 2 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