Gas heat exchanger

The gas heat exchanger consists of at least one chamber (6, 9) with couplings (7,10) for connecting to an EGR pipe inlet and outlet (5,8), and a housing (1) containing recycling fluid tubes (2). Each chamber and coupling is made in one piece by stamping, using commercial presses and a multi-stage operation. The gas to be cooled enters the heat exchanger through the inlet coupling and passes through the chamber and between the cooling fluid tubes to the outlet chamber and coupling to be mixed with the engine's intake air.