Speedmaster PCE306.1056 Piston Ring Set Bore Plasma Moly Zero Gap - 4.350 1.5-1.5-3mm

The Speedmaster PCE306.1056 piston ring set is engineered for high-performance street and racing applications, delivering superior sealing and longevity in demanding conditions. Designed for 4.350-inch bore applications, this complete ring set features a 1.5mm-1.5mm-3mm configuration with advanced zero gap technology for maximum cylinder seal.

Key Features:

• Plasma-Moly Top Ring: Ductile iron construction with plasma-moly coating and barrel-shaped profile provides excellent wear resistance and seals effectively against blow-by during piston rocking
• Tapered Secondary Ring: 1.5mm compression ring with taper design seals against the oil control ring's upper surface for superior oil management
• 3-Piece Oil Ring: Includes stainless steel expander that maintains accurate tension throughout the RPM range without robbing horsepower
• Zero Gap Design: Precision end gaps minimize blow-by and optimize compression retention for maximum power output
• Racing-Grade Materials: Built to withstand extreme temperatures and cylinder pressures in racing and high-performance street engines

This ring set combines proven materials and precision engineering to deliver reliable performance in high-stress applications. The plasma-moly coating on the top ring reduces friction while providing exceptional durability, making this an ideal choice for performance engine builds requiring 4.350-inch bore piston rings.