Will Spark Plugs Increase Horsepower

Can New Spark Plugs Improve Performance? Yes, new spark plugs can restore lost horsepower, but they won’t significantly increase horsepower beyond factory specs. If your current spark plugs are worn, fouled, or misfiring, replacing them will improve combustion efficiency, resulting in smoother acceleration, better throttle response, and optimal engine performance. How Spark Plugs Affect Horsepower…