Using this layer of carbon fiber composite material for elliptical tailpipe can avoid the direct contact between exhaust tailpipe and rear diffuser, and we choose epoxy resin system with TG value around 200℃ to further improve the high temperature resistance of the composite material. There is no doubt that owning this layer of carbon fiber composite material does not mean once and for all. Although carbon fiber can withstand thousands of degrees of high temperature, the resin used still has a certain temperature limit, which is easy to burn and melt. However, even if the epoxy resin is burned, the carbon fiber layer can still be retained (the soft physical phenomenon is restored), and it can also play a blocking role. Even if this layer of carbon fiber composite material fails completely, as long as this layer of carbon fiber composite material is replaced, the initial maintenance purpose can also be achieved, which can reduce the frequency of replacing new parts.