Diesel Exhaust System: What You Need to Know Before You Buy

Many people dream of buying a vehicle to suit their lifestyle and needs, and most of them likely have a list of features in mind in planning to buy one. But before anything else, it is essential to understand the functions of each car component—the diesel exhaust especially—before purchasing a vehicle.

This article will discuss what an exhaust system is and how it functions for better car performance.

What’s an Exhaust System? How does it work?

The exhaust system is an important vehicle component. It allows exhaust gases to escape from your vehicle and increases diesel performance. Many pieces and pipes make up the exhaust system, allowing exhaust gases to escape from your engine. The catalytic converter is usually the main component of an exhaust system. Depending on how the system is designed, exhaust gas can flow through one or all of these components.

The Functions of the Exhaust System

Exhaust gas can contain components that pose a severe threat to the environment and cause damage to human health. Your vehicle’s exhaust is responsible for safely routing exhaust gases out of your engine and regulating harmful components, so they don’t get emitted into our environment. They have become a critical element in controlling the growth of air pollution.

Today’s diesel exhaust systems can manage exhaust and subsidize diesel-using vehicles to reduce their carbon footprint. So, here’s to knowing its parts and their function in the exhaust system:

Exhaust Manifold

Apart from the 3rd generation or 4th gen Cummins, which help improve a truck’s performance, the exhaust manifold directly connected to the engine collects exhaust from each cylinder then combines it into a single pipe. Depending on the vehicle’s size, is the number of exhaust manifolds. The exhaust manifold is made up of curving passages that allow for smooth exhaust flow. The exhaust manifold is available in steel, aluminum, stainless steel, and iron cast.

Oxygen Sensor

The oxygen sensor measures the oxygen content of the exhaust, and this data allows the computer to add or subtract fuel to optimize your fuel economy and performance.


The purpose of the muffler is to reduce noise levels and soundproof your engine. This part reduces engine noise pressure by reducing vibrations through acoustic silence.

Some mufflers make use of sound waves to bounce off the baffles. The sound waves then diffuse their energy into the damper, causing them to lose volume and strength. Some mufflers can also lower the backpressure, which pushes the exhaust through an open tube with sound-absorbing material.

Exhaust Pipe

The exhaust tube is responsible for connecting all components of the exhaust system. These pipes are designed to allow exhaust to travel as efficiently as possible towards the vehicle’s rear. They keep the hot exhaust from heating components, such as the engine compartment or undercarriage of your car. Most exhaust piping is made from steel. If you need something more robust and more resistant to corrosion, stainless steel or aluminized tubing would be a better choice.

Despite all efforts to reduce pollution, it continues to rise. Today’s diesel exhaust systems are capable of managing exhaust and subsidizing diesel-using vehicles to reduce carbon emissions.

This infographic from Pure Power Diesel explains more about diesel exhaust systems.

Read More: Is Your Diesel Engine Ready for Summer?


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