To ensure reliability, purchase GM part # 12674122 Insulator Assembly, Vlv Rkr Arm Cvr. It is sometimes referred to as GM Valve Cover Gasket. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts.
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