ok, I know some of you are building exhausts and need stainless to Aluminum. Here’s where you get it. Please add what side you want to be male or female and what metal to the notes on check out. Remember that the aluminum male flanges have a rubber o-ring so it would be my suggestion you go with a male Ss and a female aluminum flange. (2, flanges and one clamp). If you don’t specify, you’re getting male ss and female Aluminum.