Bassani Down Under True Dual Exhaust For Harley Touring A True Dual exhaust system has easily become a popular system to run on your bike especially for touring models. Nothing beats the nostalgic look, sound, and feel of the system that has many riders coming back to what they know and love. Bassani offers this full system that includes, head pipes, shields , mufflers and everything needed to mount to your bike! Features: 4 straight-can mufflers with billet end caps Gives your bike a unique style, performance and sound Stepped 1-3/4 to 1-7/8 head pipes 02 sensor ports with plugs