Abstract: In one embodiment, a spark plug comprises: an electrically nonconductive body disposed in an electrically conductive shell; a side electrode extending from said shell; a sheath disposed within and protruding from a body first end of the electrically nonconductive body; a core disposed in the cavity; and a center electrode tip extending from the cavity through the opening. The sheath comprises a cavity extending from a sheath second end toward a sheath first end. The cavity connects to an opening disposed through the first end. The core is in electrical communication with the center electrode tip. The center electrode tip is in alignment with the side electrode.