This is a replacement muffler and not an exhaust system of course and is also available in the US. While I didn't check all distributors West End Motorsports is selling it for $225 (normal retail $250).
FireBrand Designs 14-1002 Loose Cannon 4" Slip On for '15 Street 500/750-Westendmotorsports.com- Free Shipping!
FireBrand Designs 14-1002 Loose Cannon 4" Slip On for '15 Street 500/750-Westendmotorsports.com- Free Shipping!