MAHLE 3030788 Chrome Performance Oil Ring Assembly Bore Std Tension - 4.090 in 2.0mm

The MAHLE 3030788 is a performance chrome oil ring assembly designed for high-output engine builds requiring precise oil control and long-term durability. Sized for a 4.090-inch bore with a 2.0mm ring width and 0.113-inch radial wall thickness, this standard-tension assembly is engineered to fit a wide range of performance pistons from leading manufacturers.

MAHLE is the world's largest piston ring manufacturer, with over a century of experience supplying original equipment and aftermarket rings to the performance and motorsports market. This oil ring assembly uses a chrome-faced rail design that delivers superior cylinder wall scraping, consistent oil film control, and extended wear life compared to standard cast iron alternatives.

Key Features:

• Bore Size: 4.090 inches
• Ring Width: 2.0mm
• Radial Wall Thickness: 0.113 inches
• Tension: Standard
• Face Coating: Chrome — provides rapid break-in and consistent contact with the cylinder wall
• Application: Performance oil ring assembly (3-piece style with two chrome-faced rails and an expander/spacer)
• Engineered to minimize oil consumption and reduce blow-by in high-performance and racing applications
• Compatible with aftermarket and OEM pistons specifying 2.0mm oil ring grooves

MAHLE performance oil ring assemblies are developed using advanced ring simulation and computer modeling tools to minimize friction while maximizing sealing efficiency. The chrome rail faces provide excellent scuff resistance and durability under the elevated temperatures and pressures found in modified or high-compression engines.