<p>Results of experimental assessment of the intensity of heat transfer by the diameter and height of the cylinder of a piston engine in filling it with the stationary air flow via intake systems with profiled pipes have been presented. The flow velocity, the air flow rate, and the local heat-transfer coefficient were determined by means of the hot-wire anemometry method. It has been established that the use of profiled pipes in the intake system of the piston engine leads to a substantial change in the profile of the local heat-transfer coefficient over the diameter of its cylinder and that with the square and triangular pipes, the degree of turbulence of the flow in the cylinder increases by 5–35% compared to the engine of basic structure. It has been shown that installing a square intake pipe in the piston engine raises the heat-transfer coefficient up to 25% over the cylinder height, and the use of a triangular pipe decreases the heat transfer to 15% compared to the basically structured engine. The obtained results may be used to design gas-exchange systems and are the initial data to calculate the piston-engine′s working cycle.</p>