NPR American V8 Engine Ring Series Piston Ring Set - 4.055 in Bore - 1.2 x 1.2 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 12-270 Kits include a weld-in or

Kits include a weld-in or bolt-in bung and an easy grip O-ring cap with positive seal

Won’t mar fittings like steel wrenches

Hole saws up to 1" diameter use 1/2"-20 thread

freeze plugs and dowel pin

NPR American V8 Engine Ring Series Piston Ring Set - 4.055 in Bore - 1.2 x 1.2 x 3.0 mm Thick - Standard Tension - Nitride - 8-Cylinder 12-270 Kits include a weld-in orProduct Description: Piston Rings American V8 Engine Ring Series 4. 055 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