Vibrant Performance 2599 Header Outlet Flange KitExhaust Flange Gasket Header Outlet Flange Kit Header Outlet Flange Kit; for Header w 2. 5 in. Outlet; SPECIFICATIONS: Position: N A Style: OEM WARNING CA Proposition 65: No FEATURES: Header Outlet Flange Kit Vibrant Performance has developed one of the largest offerings of Exhaust Manifold Flanges in the industry. All of our Exhaust Manifold Flanges have had their exhaust port size optimized for either standard wall round tubing or Schedule 10 weld