Vibrant Performance makes it easy to weld Blow Off Valve mating flanges to your induction plumbing. Each BOV Flange Kit comes complete with a radiused weld-on fitting that is threaded so that you can screw on the mating flange. The Weld Fitting and Flange are made of T661 Billet Aluminum. Each kit includes an O-Ring for a leak free seal. Press "Click to Enlarge" to see all the components included in this kit.