2.5" V Band Clamp & Interlocking Flange Set, Stainless Steel, Exhaust Clamps Stainless Steel Interlocking Flange - 2.5 inch O.D./ 2.2 mm Wall Thickness V-Band Clamp Fastener Provide Extra Security Great For High Pressure Application Such As Turbocharged Vehicled Weld Onto Exhaust Pipe, Headers, Downpipe For Fast Release