To ensure reliability, purchase GM part # 12578360 Engine Exhaust Manifold Assembly, Left. It is sometimes referred to as GM Exhaust Manifold. 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. This part fits specific Buick Lucerne models. It fits Cadillac Deville, DTS, Seville. It also fits Pontiac Bonneville.
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