Speedmaster PCE306.1004 4.040" Bore 5/64 5/64 3/16 Plasma Moly Piston Ring Set

4.040" Bore - 5/64 - 5/64 - 3/16 Plasma Moly Piston Ring Set PCE piston rings are designed to stand up to the rigor of racing and high-performance street use, while providing a long lasting life. PCE piston rings feature: Plasma-moly coated, barrel-shaped, ductile iron top rings that seal against blow-by when the piston rocks in its bore Designed to stand up to the rigor of racing and high-performance street use