Roadburner 2.5 inch Street Pros - Black Ceramic RB-015-4035 for Yamaha Road Star 1600/1700 (1999-11) 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