Speedmaster PCE306.1018 4.020 Bore Plasma Moly Piston Ring Set 1/16 1/16 3/16

The Speedmaster PCE306.1018 is a 4.020-inch bore plasma moly piston ring set engineered for high-performance engine applications. This ring set features a plasma-moly coating on the compression rings, which enhances durability and reduces friction during operation. The set is designed with precision ring gap specifications of 1/16 inch on the first and second rings and 3/16 inch on the oil ring, ensuring proper sealing and controlled blow-by in gasoline and naturally aspirated engines.

Plasma moly piston rings are ideal for stroker builds, engine rebuilds, and performance applications where improved ring stability and extended engine life are priorities. The 4.020-inch bore size is compatible with a range of small-block engines commonly used in street rods, racing, and marine applications. Installation requires proper ring end-gap verification and careful piston-to-cylinder clearance measurement to ensure optimal performance and prevent ring binding or excessive gas leakage.

Key Features & Benefits

• Plasma Moly Coating: Enhanced durability and reduced friction for improved ring performance and engine longevity.
• 4.020 Inch Bore: Precision-sized for specific stroker and performance engine builds requiring exact bore specifications.
• Ring Gap Specification: 1/16 inch on compression rings and 3/16 inch on oil ring for proper sealing and blow-by control.
• High-Performance Design: Engineered for naturally aspirated gasoline engines in demanding street, racing, and marine applications.

Specifications

Ideal Applications

• Small-block engine rebuilds and stroker builds
• Street rod and hot rod engine construction
• Racing engine assembly and upgrades
• Marine engine restoration and performance