Speedmaster PCE306.1053 Plasma Moly Piston Ring Set Zero Gap 4.290" Bore

4.290" Bore - 1.5 - 1.5 - 3mm Plasma Moly Piston Ring Set - Zero Gap 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