An annual inspection of your Infiniti exhaust components is a good investment, as well as a common-sense safety measure. In general, the Infiniti's exhaust system is made up sensitive components such as manifold, header, air pump, converter, muffler valve and exhaust tip and pipe gasket. Because of the vulnerable position of the exhaust system - on the underbelly of the car - the components can be damaged by weather elements and hard knocks on the road. A visual inspection will often show signs of rust, corrosion, dents and cracks in those components. Or, listen to your car. Does it have a rough idle, or unnecessarily loud engine? That can be the sign of damage to the catalytic converter, muffler or resonator. Smoke and excessive pollution are also indications of problems in your Infiniti exhaust system. Poor gas mileage and weak horsepower may mean damaged oxygen sensors. If your car is emitting too much smoke and odor from the tail end, then the exhaust manifolds and gaskets could be suffering from cracks or small holes. When you see these signs of wear and tear, then it is time to replace your Infiniti exhaust components. You have made an investment in purchasing a high-performance Infiniti, so protect that purchase with an annual inspection of your Infiniti exhaust system.