of heat exchange conduits in a heat exchanger are coated with a material including teflon u00ae to reduce fouling referring now to fig1 a vehicle 10 includes an exhaust gas recirculation egr system 14 that selectively supplies re circulated exhaust gas 16 to an engine 17 the egr system 14 includes the egr valve 18 and a heat exchanger 19 a control module 20 selectively opens and closes the egr valve 18 during engine operation to allow the re circulated exhaust gas 16 into an intake manifold 24 the egr valve 18 may be positioned between partially open and partially closed positions exhaust gas 30 from the engine 17 flows into an exhaust manifold 32 a recirculation exhaust conduit 34 directs some of the exhaust gas 30 into the egr system 14 the heat exchanger 19 cools the re circulated exhaust gas 16 skilled artisans will appreciate that the present invention applies to various heat exchanger configurations for example the heat exchanger may have a tube type plate type shell type or any other suitable design referring now to fig2 a and 2b an exemplary embodiment of a tube type heat exchanger 28 includes a plurality of tubes 50 that are located in a housing 52 an exhaust inlet opening 53 and an exhaust outlet opening 54 are located at opposite ends of the heat exchanger 28 the housing 52 also includes a fluid inlet opening 55 and a fluid outlet opening 56 an inlet plate 58 and outlet plate 59 may be positioned between the exhaust inlet opening 53 and housing 52 and between the housing.