I think the only issue, like Hightower mentioned, is longevity. Because Ford apparently uses a EDS ignition system the spark goes through the core and the ground for optimum spark flame front. We won't definately know how long these Iridium plugs will last unless we try them, so my purpose in doing so. I guess I'll cross my fingers and hope the nickel Ground Electrode will hold up, I know the Iridium side of the electrode will. The plugs go in today!!!
