This is a genuine General Motors exhaust manifold made for left-hand (LH) vehicles. It is a bolt-on style manifold made of cast iron and has a substrate material also made of iron. The manifold is bare and does not come with any catalytic converter or oxygen sensor. It is a vintage part and was made in the United States. The manufacturer part number and OE/OEM part number are both 3932473. This exhaust manifold is suitable for gasoline-powered vehicles.