When I tried this product, my car's emission system improved and my engine was running smoother. Moroso 68813's valve cover breather was a great addition to my performance car accessories. It was easy to install and made a noticeable difference in my car's overall performance. The breather provided increased air flow and kept my engine clean. The only downside was that it was a bit pricey, but the improvement in my car's performance was definitely worth the investment.
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