Piston Ring Set 4.030 Bore 1/16 1/16 3/16

The MAHLE PISTONS Piston Ring Set 4.030 Bore 1/16 1/16 3/16 is a precision-engineered ring kit designed for high-performance and stroker engine builds that demand OEM-quality compression and blow-by control. Built for 8-cylinder applications requiring a 4.030-inch bore diameter, this drop-in ring set addresses the specific sealing demands of oversized and modified engine platforms. Whether you're rebuilding a performance street engine, preparing for forced induction, or restoring a vintage muscle car, proper ring selection is non-negotiable for cylinder pressure retention and oil consumption management.

This ring set features a 1/16-inch top ring, 1/16-inch second ring, and 3/16-inch oil ring configuration with plasma-moly coating applied to the compression rings for enhanced wear resistance and heat dissipation. The ductile iron construction provides the durability required for sustained high RPM operation, while the standard tension design ensures proper radial force without excessive drag that would compromise horsepower or fuel economy. The plasma-moly surface treatment reduces friction at the ring-to-bore interface, critical for maintaining cylinder sealing efficiency across varying combustion pressures and engine temperatures, especially in turbocharged or nitrous-assisted applications.

Mechanics and engine builders working with 4.030-inch overbore blocks—common in LS stroker builds, big-block Chevy conversions, and Ford performance platforms—will appreciate the OEM-grade quality and precise manufacturing tolerances MAHLE delivers. Installation is straightforward as a drop-in component during block assembly, though proper ring gap verification and bore preparation remain essential for longevity. This kit is ideal for both naturally aspirated and boosted applications where compromise on compression ring integrity invites power loss, excessive oil consumption, and premature bearing wear.