Manley High Performance Piston Ring Set, Ductile Iron [Bore Size 100mm/3.937" | File Fit | Ring Widths 1.5mm x 1.5mm x 3mm | Oil Ring Type Standard Tension]

Manley rings provide minimal blow-by and increased horsepower while maintaining cooler, cleaner oil resulting in loner engine life. Top Ring: High performance ductile iron with plasma moly in-lay or premium steel with Chrome Nitride face coating. Second Ring: Reverse twist cast iron. Oil Ring: Three piece, standard tension, full oil return.