Speedmaster 4.530" Bore Plasma Moly Piston Ring Set - 1.5 x 1.5 x 3mm Zero Gap PCE306.1058

The Speedmaster PCE306.1058 is a premium piston ring set engineered for high-performance and racing applications. Featuring a 4.530" bore diameter with 1.5mm top and second ring lands and a 3mm oil ring, this set delivers superior compression and durability in demanding engine environments. The plasma moly coating provides enhanced wear resistance and thermal stability, while the zero-gap design minimizes blowby and optimizes sealing efficiency for maximum horsepower and torque output.

This piston ring set is ideal for serious engine builders, professional mechanics, and enthusiasts rebuilding or upgrading stroker engines and race motors. The plasma moly construction resists scuffing and extends ring life under sustained high-RPM operation. Compatible with a wide range of big-block and small-block builds, these rings deliver the precision fit and performance consistency that competition and high-horsepower applications demand.

Key Features & Benefits

• 4.530" Bore Size: Engineered for engines with a 4.530-inch bore diameter, suitable for large-displacement performance builds.
• Plasma Moly Coating: Advanced surface treatment enhances wear resistance and thermal stability under extreme engine conditions.
• Zero Gap Design: Minimizes ring gap for improved compression sealing and reduced blowby losses.
• Ring Dimensions: 1.5mm top ring, 1.5mm second ring, and 3mm oil ring for optimal sealing and oil control.
• Performance-Focused: Built for high-RPM race and street performance applications requiring reliability and power output.

Specifications

Ideal Applications

• High-performance engine rebuilds and stroker engine builds
• Professional race engine construction and competition motors
• Street performance and musclecar engine upgrades
• Aftermarket engine assembly for enthusiast projects