The 2018 Softail Track Tuned Header adds a big power boost, same top end Horsepower as our Mayhem but with much more in the mid range. Deeper exhaust note than the Mayhem but not quite as loud. The T/T header comes with Designer heatshields, 12mm 02 sensor bungs and easy install. If hard hitting power is your thing then you'll love this, it RIPS, really brings the Milwaukee 8 to life. Sound clip on Hackers Customs YouTube and FaceBook page. This is a complete performance system built in the USA. Fits 2018, 2019 Street Bob, Low Rider, Slim, Fat Bob, and Deluxe.