My guess is that 500F will be OK at the muffler, the exhaust gas temperature at the engine is probably closer to 1000F but it will cool of pretty quickly. If you put your hand behind the tail pipe, it is no where near that hot.
My guess is that 500F will be OK at the muffler, the exhaust gas temperature at the engine is probably closer to 1000F but it will cool of pretty quickly. If you put your hand behind the tail pipe, it is no where near that hot.