Vibrant Performance stainless steel exhaust flanges are available in a choice of 2-bolt, 3-bolt or 4-bolt configurations. All exhaust flanges are 3/8 in. thick and are offered in sizes ranging from 2 in. to 4 in. I.D. You can ensure a more accurate, leak-proof seal for your exhaust components by using exhaust flanges together with Vibrant exhaust flange gaskets. These stainless steel flanges are available individually or sold in a set.