Mahle Rings Performance Plasma Moly Steel Top Compression Ring 4.620 x 1.0MM .143 RW Moly Ring Set

These are Mahle OE Performance Plasma Moly Steel Top Compression Rings, part number 3011026. They are designed as a direct replacement for your engine's top compression ring. The plasma moly coating on these steel rings helps reduce friction and wear, which is important for maintaining good cylinder sealing and engine performance over time. They measure 4.620 inches in bore size with a 1.0mm ring width and a .143 inch ring depth.

Mahle uses a plasma moly coating on these steel rings, which is a well-known method for improving durability and reducing friction. This means the rings can handle the heat and stress inside the cylinder better, leading to a more consistent seal between the piston and cylinder wall. Proper sealing is crucial for efficient combustion, oil control, and overall engine health. This set is a solid option if you're rebuilding an engine and need reliable, well-built replacement piston rings.

Please note that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.