Speedmaster 4.280" Bore Plasma Moly Piston Ring Set - 1.5 x 1.5 x 3mm Zero Gap PCE306.1052

The Speedmaster PCE306.1052 is a precision piston ring set engineered for 4.280" bore engines, featuring plasma moly coating technology and a zero-gap design. This high-performance ring set delivers superior ring-to-bore sealing and reduced blowby, making it an essential upgrade for racing engines and serious performance builds that demand reliable compression and oil control.

Designed with plasma moly face treatment to enhance durability and reduce friction, this ring set combines the specified 1.5mm top ring, 1.5mm second ring, and 3mm oil ring configuration for optimal combustion sealing and oil management. The zero-gap design minimizes ring flutter and unwanted movement during high-rpm operation, critical for maintaining consistent performance in competition and high-output engine applications. Ideal for small-block builds, stroker engines, and any displacement requiring precision ring fitment.

Key Features & Benefits

• Plasma Moly Coating: Plasma moly face treatment reduces friction and extends ring life in high-performance applications.
• Zero-Gap Design: Engineered for precise fit and minimal ring movement at high RPM.
• 4.280" Bore Fitment: Precision engineered for engines with 4.280-inch bore diameter.
• Complete Ring Set: Includes 1.5mm top ring, 1.5mm second ring, and 3mm oil ring for full compression and oil control.
• High-Performance Grade: Built for racing, stroker builds, and engine applications demanding precision and reliability.

Specifications

Ideal Applications

• Small-block engine builds and rebuilds
• Stroker and displacement engine applications
• High-RPM racing and competition engines
• Performance engine upgrades requiring precision ring fitment