Review on ACDelco 9388U Professional Spark Plug by Danny Krishna

We recently upgraded our automotive ignition system by installing these professional spark plugs, and they did not disappoint! Based on our own experience, we found that they offer improved fuel efficiency and a smoother acceleration. The overall quality of these ignition parts is very high, giving us the confidence that they will last a long time. However, we did find that they were a bit more expensive compared to other replacement parts we have used in the past..