What spark plugs gap should I use? Matt May 23, 2018 16:04 Follow In most cases, the stock spark plug gap will work great. For heavily modified motors, consult with your engine builder for their recommendations, as incorrect spark plug gap may result in a loss of performance or severe engine damage. Related articles How to use Map Compare in Power Core How do I know how to modify a curve? What coils should I use? What spark plugs should I use? Comments 0 comments Please sign in to leave a comment.