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 What coils should I use? What type of spark plug wires should I use? Target Tune Troubleshooting Guide Comments 0 comments Please sign in to leave a comment.