Vibrant1470SFlangesVibrant Performance Stainless Steel Exhaust Flanges are available in sizes ranging from 2" to 4" I.D. and a choice of 2 and 3 Bolt configurations. All Flanges are 3/8" (10mm) thick. They can be purchased individually or in cost effective boxes of 5. Vibrant Performance also offers a 4 Bolt flange for oval tubing in sizes ranging from 3" to 4" nominal oval size.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.