The Speedmaster PCE306.1036 is a Plasma Moly piston ring set engineered for a 4.000-inch bore diameter with a 1.5mm top ring, 1.5mm second ring, and 3mm oil ring configuration. The plasma moly face coating promotes superior ring sealing, reduced friction, and extended wear life — making this set a strong choice for performance engine builds demanding consistent ring seal and durability.
Designed with a Zero Gap specification for optimized combustion efficiency and minimized blow-by, these rings are well-suited for high-performance street and racing engine applications. Always verify bore size and ring groove dimensions against your specific engine application before installation to ensure proper fitment and performance.