To ensure reliability, purchase GM part # 558873 Valve, Exhaust. It is sometimes referred to as Cadillac Exhaust Valve. 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 Cadillac Deville, Fleetwood, Seville models.
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