Speedmaster PCE306.1053 4.290" Bore 1.5-1.5-3mm Plasma Moly Piston Ring Set Zero Gap

The Speedmaster PCE306.1053 is a high-performance piston ring set engineered for precision engine rebuilds and performance applications. This set features a 4.290" bore diameter with 1.5-1.5-3mm ring dimensions and plasma moly coating to enhance durability and ring seal integrity. The zero-gap design minimizes blow-by and maximizes combustion efficiency, making it ideal for high-revving engines and competition builds.

Plasma moly piston rings deliver superior heat resistance and wear characteristics compared to standard cast-iron rings, extending engine life and maintaining consistent compression across the power band. The precise manufacturing tolerances ensure proper fit and function across a wide range of engine block specifications. This ring set is suitable for engine rebuilds, performance upgrades, and racing applications where reliable ring seal and minimal friction are critical performance factors.

Key Features & Benefits

• Plasma Moly Coating: Heat-resistant surface treatment enhances durability and reduces friction during engine operation.
• Zero Gap Design: Minimizes blow-by and improves combustion seal efficiency for optimized power delivery.
• 4.290" Bore Diameter: Precisely matched ring dimensions ensure proper fit and seal in target engine block sizes.
• 1.5-1.5-3mm Dimensions: Compression, intermediate, and oil ring thicknesses engineered for balanced performance.

Specifications

Ideal Applications

• Engine rebuilds and overhauls requiring precision ring sets
• High-performance and racing engine builds
• Displacement or bore-up engine modifications
• Compression and efficiency restoration in worn engines