See Figures 1 and 2
Two types of pipe connections are used on most exhaust systems, they are: the ball joint (to allow angular movement for alignment purposes) and the slip joint. Gaskets are used only with the ball joint type connections.
The system is supported by free hanging rubber mountings which permit some movement of the exhaust system but do not allow the transfer of noise and vibration into the passenger compartment. Any noise vibrations or rattles in the exhaust system are usually caused by misalignment of the parts.
As with many areas of service on your truck, the exhaust system presents it's own dangers. Always follow the safety precautions carefully during exhaust system service.