Roadburner 3 inch Drag Pros - Black Ceramic RB-035-8020 for Kawasaki Vulcan 900 (2006-11) Guaranteed not to discolor for 1-Year All Roadburner pipes feature patented doublewall design Features True Double Wall Construction.( US Patent #6,908,980) CNC Machined billet end caps. Baffles and mounting hardware included