After installing this product, the high-frequency noise disappeared. However, the car makes a chugging and chugging noise when starting in the morning. Took some local mechanics, didn't help. Took the car to PepBoys today and they told me the noise was coming from a new valve cover oil separator that had just been replaced. They even showed me by tapping on the round lid. to reproduce sounds. I do NOT recommend you to buy this product. It's not worth the cost. It is better to get it from a dealer or an OEM product.
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