For most owners, the exhaust system is an out-of-sight, out-of-mind portion of the airplane. Its certainly not a sexy part of any aircraft-even the FAAs description of the exhaust system in its Airframe and Powerplant Mechanics Powerplant Handbook is a little off-putting: …a scavenging system that collects and disposes of the high-temperature, noxious gases as they are discharged by the engine. Nevertheless, all exhaust systems deserve a great deal of respect and your attention and consideration because they live in a horrible environment of intense heat, flame, corrosive gases and vibration. Plus, if any component fails, the risks are nothing short of serious: carbon monoxide poisoning of the aircraft occupants, partial or total engine power loss and fire.