Improves overall performance including starting, stops high-speed misfires and increases mileage Peak spark voltage increases by at least 20% 30,000 V output - Harley-Davidson Blackline FXS (2012, 2013, 2011); Harley-Davidson Softail Rocker C FXCWC (2011); Harley-Davidson Breakout FXSB (2015, 2016, 2014, 2013)