Most modern exhausts feature rubber exhaust hangers that support most, if not all, the weight of a car's exhaust system. Even though rubber is a rather resilient material, it does degrade over time and eventually these hangers will require replacement. The process is rather simple and requires little mechanical knowledge; in fact, depending upon the make and model of your car, you may not even need tools.
Jack the car up on jack stands. Make sure it is stable enough to withstand some shaking.
If necessary, unbolt your exhaust at the catalytic converter. (While it may not be necessary to the exhaust hanger removal process for all makes and models, unbolting the exhaust may ease the process on any car.)
Locate the rubber exhaust hangers and unhook them from underneath the car, then pull them off the exhaust. If the hangers are in particularly bad shape or are tight on the exhaust, you may need to lubricate them or pry them off.
