NPR American V8 Engine Ring Series Piston Ring Set - 4.165 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 23-FLT-NFO-L Fits 1964 to 1967 GM

Fits 1964 to 1967 GM A-Body

Does NOT fit vehicles fitted with NPP performance exhaust option with Quad Tips

Useful for measuring valve spring installed height

Disconnect radiator hose and heater hose from the timing cover

NPR American V8 Engine Ring Series Piston Ring Set - 4.165 in Bore - 1.5 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 23-FLT-NFO-L Fits 1964 to 1967 GMProduct Description: Piston Rings American V8 Engine Ring Series 4. 165 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