Engine Pro 43SM8527-025 Performance Steel Moly Race Piston Ring Set .025 Oversize

The Engine Pro 43SM8527-025 is a high-performance piston ring set engineered for demanding racing and high-compression applications. This premium ring set features an impact-resistant plasma moly alloy top ring designed to withstand high stress and elevated temperatures, delivering reduced side wear and extended service life.

Key Features:

• Top Ring: Steel construction with plasma moly coating for superior wear resistance
• Second Ring: Cast iron with reverse torsional twist design, or ductile iron Napier style (depending on configuration)
• Oil Ring: Flex-Vent design for optimal oil control
• Standard tension configuration: .043" - 1/16" - 3/16"
• Bore size: 4.0250" (.025" oversize from 4.000" standard bore)
• Alloy steel construction for high-temperature performance
• Designed for most demanding high-compression racing applications

This ring set is ideal for performance rebuilds where durability and reliability under extreme conditions are critical. The plasma moly coating provides exceptional resistance to scuffing and wear, while the precision-engineered ring profiles ensure optimal sealing and oil control. Available in multiple oversizes including Standard, .005", .025", .035", .045", .065", and .080" to accommodate various bore sizes.