The Mahle OE plain piston ring set is specified as a Performance Steel Napier second ring sized 4.355 in x .043 in with .135 RW. Supplied in the described catalog configuration, this plain ring set provides the listed dimensions for piston rebuild or replacement projects. Verify the part size against your engine's specifications before installation.
Mahle Rings Perf Steel Napier 2nd Ring 4.355in x .043 .135in RW Plain Ring Set (48 Qty Bulk Pack)