Speedmaster PCE306.1055 4.330" Bore Plasma Moly Piston Ring Set - 1.5 x 1.5 x 3mm Zero Gap

The Speedmaster PCE306.1055 is a precision piston ring set engineered for high-performance engine applications requiring a 4.330" bore. This plasma moly piston ring set features a zero-gap design with 1.5mm top ring, 1.5mm second ring, and 3mm oil ring, delivering reliable compression sealing and minimal blow-by. The plasma moly coating enhances durability and reduces friction, making this ring set ideal for street and competition engines that demand superior ring stability and longevity.

The zero-gap design eliminates the need for individual ring gap fitting on most standard applications, streamlining the installation process for engine builders and machine shops. Plasma moly construction provides excellent wear resistance and thermal stability, ensuring consistent performance across extended operating ranges. This Speedmaster ring set is a direct replacement solution for engine rebuilds, performance upgrades, and high-revving applications where precision-engineered components are essential for peak engine efficiency and durability.

Key Features & Benefits

• Plasma Moly Coating: Enhanced durability and reduced friction for improved ring performance and engine longevity.
• Zero Gap Design: Pre-sized rings eliminate individual gap fitting requirements for streamlined engine assembly.
• 4.330" Bore Diameter: Precisely engineered for engines with this specific bore dimension.
• Ring Configuration: 1.5mm top, 1.5mm second, and 3mm oil ring for optimized compression and oil control.

Specifications

Ideal Applications

• Engine rebuilds and machine shop assembly
• Performance and high-revving street engines
• Competition and racing engine builds
• Replacement ring sets for 4.330" bore engine blocks