To ensure reliability, purchase GM part # 12588670 Dampener Assembly, Timing Chain. It is sometimes referred to as Pontiac Timing Chain Tensioner. 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 Pontiac GTO, Grand Prix models.
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