To ensure reliability, purchase GM part # 91174431 Arm,Valve Rocker Exhaust No.1 (On Esn). It is sometimes referred to as GM Rocker Arm. 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 Chevrolet Tracker models.
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