Which of the following is NOT a component of the exhaust system?

The oil filter is the component that is not part of the exhaust system. The primary role of the exhaust system is to guide combustion gases away from the engine to the outside atmosphere, while also reducing noise and emissions. Key components of the exhaust system include:

• Exhaust pipes, which transport exhaust gases from the engine to the rear of the vehicle.

• The exhaust manifold, which collects exhaust gases from multiple cylinders and directs them to the exhaust pipes.

• The muffler, which decreases the noise produced by the expulsion of these gases.

In contrast, the oil filter is associated with the engine's lubrication system, helping to keep engine oil clean by filtering out contaminants. While all components are crucial for vehicle operation, only those involved in managing exhaust gases are part of the exhaust system, thus clarifying why the oil filter is not listed as a component of that system.