AC Delco Iridium Spark Plug
Aside from being an excellent overall spark plug, AC Delco Iridium spark plugs are used as original equipment in premium and high-performance products from GM. Thanks to the higher melting point that the iridium electrode offers, this allows a more powerful spark that would wear out standard spark plugs. The powerful spark ensures a thorough ignition of the fuel/air mixture, meaning your engine will run much cleaner and smoother.
The AC Delco Iridium spark plug requires little to no maintenance, though it’s always a good idea to check gap spacing every once in a while if you suspect that the spark plugs are becoming worn. These spark plugs are rated to last 100,000 miles, and will offer substantial performance for the entire duration of their service life.