Exhaust Manifold With Thin Flanges

An exhaust manifold for an engine, the exhaust manifold comprising:

• at least one collecting pipe for conveying exhaust gases;
• several exhaust gas inlets in fluid communication with the at least one collecting pipe;
• several flanges each defining one of the exhaust gas inlets, each flange having an external face adapted to be pressed against a receiving surface of the engine;
• several back flanges, each back flange being associated to one of the flanges and being adapted to press the corresponding flange against the receiving surface;
• and
• wherein the flanges are areas of a single plate, the plate having a thickness between 0.2 and 2 mm, said areas being continuously connected to one another by other areas of the plate, and wherein the collecting pipe is not integral with the plate, the exhaust manifold having leak tight connections connecting the at least one collecting pipe to each of the flanges.