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This Mahle OE plain ring set is a Napier THM-13 plain piston ring kit specified at 4.140 inches with 1.5 mm thickness and .150 ring width. Intended as a replacement ring set for compatible engines, the product listing focuses on the precise nominal dimensions to ensure fit where these measurements match the cylinder and piston geometry.
Mahle Rings Performance Steel Napier THM-13 4.140 x .1.5MM .150RW Plain Ring Set
