Speedmaster PCE306.1032 4.020" Bore Plasma Moly Piston Ring Set Zero Gap

The Speedmaster PCE306.1032 is a 4.020" bore plasma moly piston ring set engineered for high-performance engine applications. Featuring a zero gap design, this ring set is constructed with plasma-moly material, which provides superior heat resistance and durability compared to standard cast iron rings. The set includes compression rings (1/16" and 1/16") and an oil control ring (3/16"), making it a complete solution for engine rebuilds, racing engines, and performance modifications.

This piston ring set is ideal for enthusiasts and professional engine builders working with precision-bore applications. The plasma-moly coating enhances ring life and reduces blowby, supporting reliable sealing and improved combustion efficiency. Zero gap rings are precision-fitted for tight tolerances, making them suitable for high-RPM engines where standard ring designs may fail. Whether you're rebuilding a naturally aspirated engine or modifying a performance build, the Speedmaster PCE306.1032 delivers the durability and sealing performance required for demanding applications.

Key Features & Benefits

• Plasma Moly Coating: Enhanced heat resistance and durability compared to standard cast iron rings.
• Zero Gap Design: Precision-fitted for tight tolerances and high-RPM engine applications.
• Complete Ring Set: Includes 1/16", 1/16", and 3/16" rings for full piston ring coverage.
• 4.020" Bore Size: Engineered for engines with 4.020" bore specification.
• Performance-Focused: Reduces blowby and supports improved combustion efficiency in rebuilt or modified engines.

Specifications

Ideal Applications

• Engine rebuilds and machine shop applications
• High-RPM racing and performance engine builds
• Precision-bore engine modifications
• Professional and enthusiast engine restoration projects