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Mahle plain piston ring set for a 4.030 in bore with 1.5 mm ring width and .151 RW specification. This steel Napier-style ring set replaces OE plain rings during engine rebuilds, restoring necessary sealing and compression control. Mahle's component is intended for rebuilds that retain original ring geometry and bore sizing, providing a conservative, OEM-compatible option for reliable engine service.
Mahle Rings Steel Napier THM 4.030in x 1.5MM .151 RW Plain Ring Set
