Modified RC 6061 CNC Aluminum- (made here in USA) spark plug cover.   Protect that plug and add a little style to your baja.
 
When changing or checking spark plugs for motor tuning this cover does not need to be removed. The HPI plug wrench works great with it. There is 3/4 inch clearance between the tip of the spark plug(without boot and wire) to the inside of the cover.