Mahle Rings Perf Plasma Moly Steel HV385 Top Ring 4.045in x 1.5MM .151in RW Ring Set (48 Qty Bulk)

Mahle OE is known for making solid engine components that go into a lot of factory vehicles, and this performance plasma moly steel top ring set is a great example of their work. If you're rebuilding a performance engine or working on a high-output application, these rings are designed to handle the extra stress and heat. They feature a plasma-moly coating on the top ring, which is a tough surface treatment that helps reduce friction and wear, especially under demanding conditions. This coating is crucial for maintaining a good seal and ensuring the longevity of your engine’s top end.

These rings are made from high-strength steel, giving them the durability needed for engines that see a lot of action. The specific dimensions, 4.045 inches in bore size with a 1.5mm top ring thickness and a .151 inch groove width, mean they are intended for specific piston and cylinder bore combinations. This set comes in a bulk quantity of 48 rings, making it suitable for engine builders or shops working on multiple projects. The HV385 designation points to a specific performance profile Mahle uses for these types of rings, indicating they are built for improved performance and durability over standard rings.

When you're putting together a serious engine build, the details matter. Using well-made piston rings like these from Mahle OE helps ensure a proper seal between the piston and cylinder wall. This seal is critical for compression, oil control, and overall engine efficiency. Because these are performance-oriented rings, it's important to ensure your pistons and cylinder bores are prepared to the correct specifications to match these dimensions and achieve optimal performance and sealing.