In an exhaust system, the aim is to guide the exhaust gases away from the engine.
The basic exhaust system contains an exhaust manifold leading to a down pipe and then piping leading to, most commonly, the rear of the vehicle. Some larger vehicles like the Transit have the exhaust pipe out to the side of the vehicle, about halfway down its length. Also there are some vehicles that have one or more silencers built in to quieten the noise, some even have turbochargers, EGR’s and others like systems, which are built into the exhaust system. Depending on whether you have a petrol or a diesel engine the exhaust will have added extras like a Catalytic converter, Diesel Particulate Filter or the AdBlue system.