Are SplitFire Spark Plugs pre-gapped?
No. The plastic cap that is put on the end of SplitFire Spark Plugs is there to protect the ground electrode from getting damaged during shipping — not to keep a set gap. One SplitFire Spark Plug can fit various engines with each requiring different gap settings. To gap SplitFire Spark Plugs, use a flat or round wire gauge. Don’t use a graduated scale gauge, they will result in one “ear” of the ground electrode being lower that the other one. Make sure the wire gauge is wide enough to gap both “ears” of the SplitFire Spark Plugs.
