LJMS Truck Manifold Turbo Builder Flange Set - LJMSTruckFlangeSet - These thick, durable stainless steel exhaust flanges match the OEM truck flange found on truck exhaust manifolds and shorty headers from 99-07 on LS engines. Great for fabricating a custom exhaust or turbo hotside for your LS swap project. 2.25" outlets with 2.5" bevel on wide side flange ONLY.