A Cadillac is an investment in enjoying a luxurious automobile ride, so maintain that quiet, powerful engine by checking your Cadillac exhaust system. The car's engine system relies on the Cadillac exhaust to move the waste exhaust material from engine to tailpipe. That 'exhaust material' is typically waste byproducts from the engine such as hydrocarbons, carbon dioxide, carbon monoxide and sulfur dioxide. In addition to regulating proper exhaust flow, a Cadillac exhaust system regulates silencing and emission levels for your car. A worn out, damage exhaust system will mean an overly loud engine, rough idle, poor gas mileage, smoke and odors. You may face a failed emissions exam, if that is required in your area, because of an underperforming muffler or catalytic converter. So consider checking your exhaust system at least once a year. In general, the Cadillac'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. If you see signs of damage, it's time to replace your Cadillac exhaust system.