Stainless steel exhaust flange compatable with RD400, RZ350 and Banshee stainless exhaust. Works great for older exhaust that didn’t have o-ring options, or the flanges are damaged. These flanges will fit all stock or after market Yamaha Banshee. Cylinder, or Wicked Motorsports billet flanges. Except the RD350 AC. Exhaust Stud patter is too tight