Mahle Rings Perf 4.205in x .043in Steel Napier Second Ring .135in RW Plain Ring Set (48 Qty Bulk Pk)

If you're rebuilding the engine in a performance application, getting the piston rings right is crucial for sealing and power. These Mahle OE performance rings are designed for a 4.205-inch bore, featuring a .043-inch Napier second ring. The Napier hook on the second ring helps scrape oil and improve seal against the cylinder wall, especially important in high-performance builds where cylinder pressures are higher.

This bulk pack contains 48 rings, making it a solid option for shops or builders working on multiple engines or larger projects. Mahle is a well-known name in engine components, and these steel rings are built to handle the demands of performance engines. The plain finish on the ring set is standard for many performance applications, ensuring good initial seating and long-term wear.