Patent ID: 7272927

Claim:
An air gap-insulated exhaust manifold for an internal combustion engine, comprising: a flange with first openings for fastening elements and second openings which are arranged to align with cylinder exhaust ports of the internal combustion engine; a gas-tight outer shell connected to the flange in a gas-tight manner, the outer shell including a trough-shaped lower part with openings arranged to align with the cylinder exhaust ports of the internal combustion engine, and a hood-shaped upper part, the lower part and the upper part being welded together in a gas-tight manner; an inner shell having a trough-shaped lower part with openings arranged to align with the cylinder exhaust ports and a hood-shaped upper part, the lower part and the upper part being connected to each other, the inner shell being welded at only one place to a base of the outer shell, wherein the openings in the inner shell which do not have the weld have a larger diameter than the welded opening; and tabs formed on the outer shell in an area of one of the openings in the inner shell which has no weld, the tabs being bent over onto the lower part of the inner shell to form a sliding seat.