Thanks for the great tips guys and I have heard some say that they have had poor results from Bosch and some seem to like them. So far, no bad results with Motorcraft which I have used many times before.my two cents. Stay far away from Bosch...stick with Motorcraft, Autolite or Denso Iridiums. For some reason Bosch dont always work in the Ford motors. I put in a set and my truck ran so rough I thought it was gonna shake apart. I put the old plugs in and it ran smooth so I chucked the Bosch and put in a set of Autolite Dbl. Plats...runs smooth.
Extreme you must be one of the lucky few that don't have an issue with the Bosch plugs.
Iowa check your owners manual or a repair manual for the proper type of plug to use. Stick with that and never trust that the plug is pre-gapped to the proper size. Spend the small amount of $ for a gap gauge and gap them to the proper size your self that way you know they are right.