ACCESSORIESHD - 1 3/4 Inch Black LAF Ground Shakers Exhaust for Harley-Davidson Sportsters, Baggers, Softails and Customs 1 3/4" Diameter Custom Choppers with either left or right side drive, sportsters,baggers,softails 18MM O2 BUNGS, AND COMES WITH PLUGS IF YOU BIKE DOESN'T USE 02 SENSORS Comes with mount that secures the 2 pipes to each other.