Mahle Rings Perf Steel Napier THM-13 4.150in x .1.5MM .150RW Bulk Plain Ring Set (48 Qty Bulk Pack)

Mahle is known for making well-built engine components, and these steel Napier piston rings are a solid option for engine rebuilds. These rings are designed for a 4.150-inch bore and feature a Napier hook design on the second ring, which helps with oil control and prevents blow-by. This bulk pack comes with 48 rings, making it a convenient choice for shops or anyone working on multiple engines or a V-configuration engine.

The steel construction offers good durability, and the specific ring dimensions (.1.5MM top ring, .150RW second ring) are designed to seal effectively in performance applications. While these are not CARB approved and cannot ship to California, they are a popular choice for engine builders looking for reliable ring sets that fit right and perform well.