D&D Boss Slant Cut Slip on Mufflers for 2009 Harley Touring and Dresser Models The 4" Boss slip-on mufflers are designed exclusively for the 2009 Harley-Davidson touring models. E These are a straight slip-on installation! Install them on your stock head pipes and take off the b Add a high flow air cleaner and you will not need to make any adjustments to the fuel system. High Quality Chrome and Great Performance