Mahle Rings 4.0950 Bore Dia 1.2MM EW Steel Plasma Moly Top Ring Moly Ring Set (48 Qty Bulk Pack)

The 1.2mm EW steel plasma moly top ring is a key feature of this Mahle OE Moly Ring Set, designed for a 4.0950-inch bore. This specific ring design and material choice are crucial for ensuring a proper seal between the piston and cylinder wall, which directly impacts engine performance and longevity. Mahle, a well-known name in engine components, offers this bulk pack of 48 sets, making it a practical choice for engine builders or shops working on multiple engines.

The plasma moly coating on the top ring is a notable detail, offering improved wear resistance and a lower friction surface compared to plain cast iron rings. This translates to better oil control and reduced cylinder wall wear over the life of the engine. The Moly second ring also contributes to a strong seal and helps to scrape excess oil from the cylinder walls, further preventing oil consumption and blow-by. These rings are built to meet the demands of a rebuilt engine, ensuring reliable operation.

This is a bulk pack containing 48 complete ring sets, which is ideal for professional engine builders or those undertaking multiple engine rebuilds. It's important to 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 to ensure optimal performance and durability.