Mahle Rings Performance Plasma Moly Steel Top Compression Ring 4.605 x 1.0MM .143 RW Moly Ring Set

These Mahle OE top compression rings are made from plasma moly steel, a strong material chosen for its ability to withstand high temperatures and pressures found in performance engines. They measure 4.605 inches in bore size with a 1.0mm thickness and a .143-inch ring width, designed to create a tight seal against the cylinder wall. This tight seal is crucial for maintaining proper compression, which directly impacts engine power and efficiency.

The plasma moly coating on these rings helps reduce friction and wear, extending the life of both the rings and the cylinder bores. This is particularly important in engines that see frequent use or higher performance demands. Mahle is a well-known name in engine components, and these rings are built to meet the needs of a performance rebuild, ensuring reliable operation after installation.

Please note that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for installation procedures and torque specifications.