Mahle Rings Performance Steel Napier THM-13 4.170in x 1.5MM .150RW Plain Ring Set (48 Qty Bulk Pack)

Mahle OE is known for making solid engine components, and this set of performance steel Napier piston rings is no exception. If you're rebuilding an engine, especially one where you want improved sealing and durability, these rings are a popular choice. They feature a Napier hook design on the second ring, which helps with oil control and prevents ring flutter at higher RPMs, making them well-suited for performance applications.

This is a bulk pack containing 48 ring sets, so it's ideal for shops or builders working on multiple engines or larger projects. The rings are made from steel and have a plain finish, designed for reliable performance. The 4.170-inch bore size and specific ring land dimensions (.150 inch for the second ring) mean they are intended for specific engine builds where precise fitment is key. Remember, these are not CARB approved and cannot be shipped to California.