Review on ACDelco 9726RR Professional Spark Plug by Joseph Winfrey
Useless Spark Plug, Don't Waste Money!
Based on my observations, this spark plug failed to improve my car's performance or gas mileage despite being marketed as a "professional" part... The only upside is that it was easy to install. However, I would not recommend buying this product as there are much better options available on the market..
- Durable and reliable, ensuring efficient engine performance.
- Not compatible with non-ACDelco ignition systems.
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