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The Mahle OE moly piston ring set for GM 396/421 (1963–1969) provides OE-driven piston ring technology intended to reduce friction and ring mass while helping minimize engine oil consumption. MAHLE piston rings are developed to meet original equipment standards and emphasize longer service life and modern ring design, offering a direct replacement for restoration or rebuild projects requiring period-correct fitment.
Mahle Rings GM 396/421 63-69 Moly Ring Set
