The present invention relates to an engine pipe flow rate increasing apparatus. The object of the present invention is to induce circulating discharge of exhaust gas to increase a discharge flow rate to smoothly discharge the exhaust gas. That is, the present invention relates to the engine pipe flow rate increasing apparatus comprising a flow rate increasing tube (100) fastened to the end of an exhaust pipe (1), and a flow rate circulating tube (110) formed in the flow rate increasing tube (100). Accordingly, the present invention provides an engine pipe flow rate increasing apparatus comprising the flow rate increasing tube fastened to an end of the exhaust pipe, and the flow rate circulating tube formed inside the flow rate increasing tube. Therefore, exhaust gas is smoothly discharged by a circulating flow, thereby improving the fuel efficiency of an engine due to the reduction of exhaust resistance.
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