12620540 Ecotec LNF Spark Plug Iridium 41-108, Replaces 12620540, 12617309
4 Required, Priced Per One.
- - Iridium offers excellent engine idle stability and smooth performance
- - Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration
- - Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form
- - One piece suppressor seal helps block radio frequencies that can affect vehicle electronics
- - Suppressor seal meters spark energy for long electrode life and helps prevent combustion leakage
- - Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- - ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
