Mahle Rings Perf Plasma Steel Top Ring 4.045in x 1.0MM .143in RW HVOF Moly Ring Set (48 Qty Bulk Pk)

Mahle is a well-known name in the automotive world, particularly for their OE (Original Equipment) quality engine components. This bulk pack of performance plasma steel top piston rings, part number 3011061B, is a prime example of their commitment to engine building. These rings are designed for a 4.045-inch bore and feature a 1.0mm top ring thickness with a .143-inch oil ring width, utilizing a plasma-moly coating applied via HVOF (High Velocity Oxygen Fuel) thermal spray. This advanced coating is known for its exceptional hardness and wear resistance, which helps to reduce friction and improve sealing between the piston and cylinder wall. This is crucial for maximizing compression and preventing blow-by, especially in performance applications where engines are pushed harder.

The plasma-moly coating is a key feature here. It's a very durable surface that mates well with cylinder walls, creating a strong seal that can withstand higher temperatures and pressures. The 'RW' designation typically indicates a Napier hook or similar design for the second ring, which aids in oil control and helps the top ring seat properly. This set comes in a bulk pack of 48 rings, making it suitable for engine builders working on multiple projects or high-volume shops. While these are performance-oriented rings, they are built to Mahle's OE standards, meaning you can expect solid construction and reliable performance when installed correctly.

When rebuilding an engine, especially one where performance is a consideration, the quality of the piston rings is paramount. These Mahle rings offer a well-built solution with advanced materials and coatings designed for durability and optimal engine function. 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 ring gap setting and installation procedures to ensure the best possible seal and longevity for your engine build.