Supersprint did have headers available for the US 500. They had a part number and the North American rep gave me some info on it. As of last week they were still on their N. American website for anyone to buy but now they have been pulled down. Their office is currently closed so I'll try calling them in the morning. I'm helping them test fit and promote their exhausts to our cars so if they just found out that the headers don't fit and took them down without warning then that annoys me. Keep you updated.