Mahle Rings Performance Steel Napier THM-13 4.130 x .043 .135 RW Plain Ring Set (48 Qty Bulk Pack)

When you're rebuilding an engine, getting the piston rings right is crucial for sealing the combustion chamber and managing oil. These Mahle OE Performance Steel Napier THM-13 rings are built for that job. They're designed for a 4.130 inch bore and feature a .043 inch top ring thickness, with a .135 inch oil ring width, ensuring a solid seal in your cylinders.

The steel construction means these rings are strong and durable, able to handle the pressures and heat of regular operation. The Napier hook design on the second ring is a notable feature; it helps to scrape oil off the cylinder wall more effectively as the piston moves down, which can reduce oil consumption and prevent blow-by. This bulk pack of 48 sets is ideal for shops or builders working on multiple engines or larger projects.