Speedmaster 4.030" Bore Plasma Moly Piston Ring Set, 1/16 - 1/16 - 3/16, Zero Gap PCE306.1033

The Speedmaster PCE306.1033 is a precision piston ring set engineered for high-performance engine applications requiring a 4.030" bore diameter. Featuring a plasma moly coating on the compression rings, this zero-gap ring set delivers enhanced durability and heat resistance for demanding racing and street performance builds. The configuration includes two 1/16" compression rings and one 3/16" oil ring, providing optimal sealing and ring flutter control across a wide RPM range.

Plasma moly technology improves ring longevity by reducing friction and wear on cylinder walls while maintaining consistent blow-by control. The zero-gap design minimizes side clearance variation, promoting stable ring seating and repeatable performance from engine to engine. This ring set is ideal for builders working with 4.030" bore blocks seeking reliable compression and oil control without compromise. Compatible with both naturally aspirated and forced-induction small-block applications, the PCE306.1033 delivers the precision fit and quality expected from Speedmaster's performance-focused engine components.

Key Features & Benefits

• 4.030" Bore Diameter: Precision-engineered for engines with 4.030-inch bore specifications.
• Plasma Moly Coating: Enhanced compression rings with plasma moly surface treatment for improved durability and reduced friction.
• Zero Gap Design: Minimized side clearance variation for consistent ring seating and performance.
• Complete Ring Configuration: Includes two 1/16" compression rings and one 3/16" oil ring for optimal sealing and control.
• Performance-Grade Quality: Built to Speedmaster's standards for racing and high-performance engine applications.

Specifications

Ideal Applications

• High-performance small-block engine rebuilds
• Racing and competition engine builds
• Street performance and modified engine applications
• Naturally aspirated and forced-induction engine combinations