This is a original Corvette / Chevy 21/2" exhaust manifold----- GM Number part # 3797942. They were used on most 1963-1964-1965 Corvettes and Chevys of that vintage. Were also used on many other GM Cars and Trucks of that vintage. ---- This is manifold has a professional weld that is mostly on the back side Manifold is painted with hi temp 1200 degree paint------(check the pictures). Studs (2) are fine. Always check your references. --- -----Key Words: Posi / Dual Quads / Carter Carbs / WCFB / Vette / FI / AFB / GM / AC Delco / Borg Warner / 283 / 327 / Muncie / 4-Speed / Chevrolet / Delco Remy / Wonderbar / AIR / Rat Rod.