NPR American V8 Engine Ring Series Piston Ring Set - 3.937 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder COM34-236-4 and Mast Black Label LS3

and Mast Black Label LS3

Provides 3500 to 3800 Stall behind Small Blocks and 3800 to 4000 Stall behind Big Blocks

1 in Round Port

Muncie 4-Speed Transmissions How to Rebuild and Modify

Important For Headers

NPR American V8 Engine Ring Series Piston Ring Set - 3.937 in Bore - 1.2 x 1.5 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder COM34-236-4 and Mast Black Label LS3Product Description: Piston Rings American V8 Engine Ring Series 3. 937 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