News - What Is A Dual Exhaust System?

What Is A Dual Exhaust System?

What Is A Dual Exhaust System?


Being knowledgeable and aware of the inner workings of your vehicle can be pretty helpful at times: for instance, if your vehicle brakes start squeaking or your engine will overheat too often. Doing things DIY-style in these cases could save you some cash.

As the engine is the heart of your vehicle, you should be aware that it follows a strict cycle with no deviations. The last element of this cycle is the exhaust system that allows the engine to get rid of the leftovers and carry on working as usual.

There are two types of exhaust systems: dual and single. Depending on your car, you can have either of those and may wonder where the difference lies. 

Exhaust System And The Engine

An internal-combustion engine is a heat engine that converts energy from the heat of burning gasoline. When all is over, the burning gasoline turns into mechanical work, or torque, which applies to the wheels and creates vehicle movement.

Engines have pistons that move up and down inside metal tubes (cylinders). They, in turn, connect with the crankshaft that spins with their help. Depending on the vehicle, there may be between two or twelve cylinders with the corresponding number of pistons. 

Modern engines undergo a specific cycle: combustion, intake, compression, and exhaust. Combustion pushes the pistons down from the top of the cylinder. As engines need air to burn fuel, during intake, valves open up and allow ambient air to come in. When the piston reaches the bottom, the valves close for compression and are then sent upward to absorb the intake charge. After that, what remains goes out of the automobile through the exhaust system. 

Dual And Single Exhaust Systems

The exhaust then goes out of the car through a separate exit route, which ends up in your muffler. However, if you were to add one more route and another muffler, you would get a double exhaust system. 

If your engine has multiple cylinder banks (six or more) and you have a single exhaust, a “Y” pipe connects both cylinder manifolds to the same exhaust pipe. From there, the exhaust goes through one oxygen sensor, a catalytic converter, and a muffler. In dual exhaust systems, two separate pipes pass the exhaust between two sensors: catalytic converter and muffler arrays. The main difference is that with a dual system, the engine expels gas much faster.

Dual exhaust works best only in certain vehicles, preferably high-performance ones. It produces an unmistakable deep, throaty, or higher-pitched sound beloved by car enthusiasts and improves performance and fuel efficiency due to the low energy burden on the engine. 

On the other hand, the single exhaust is meant for regular, non-high-performance vehicles. Such systems are cheap to service and come pre-installed in most autos. If your ride has one, and you decide to do the switch, know there will be no performance increase due to your engine. 

Will Dual Exhaust Make The Engine Louder?

If you will, however, proceed with the switch, noise shouldn’t be a significant concern. Dual exhaust systems never produce more noise than single ones. But they do change the sound quality of your vehicle in various ways:

  • Pipe length and diameter. The longer and broader an exhaust pipe is, the louder and deeper the sound it can produce.
  • Piping configuration. Here you will have a couple of options, but usually, the X-pipe delivers a more high-pitched sound, while an H-shaped one gives a deeper tone of a hot rod. 
  • Muffler and modifications. Mufflers directly affect how loud your car is. Browse the market, look for suitable muffler tips and get the sound you want. 


While it is true that a car can benefit from a dual exhaust, it’s by no means a one-for-all solution. It does help the engine work better if you have a high-performance vehicle but does nearly nothing for regular four-cylinder engines. 

If you think you should switch from single to dual, consult a mechanic or read about your car model online. Enquire just what kind of engine you have, and if everything checks out, proceed to make the necessary purchases. 


Post time: Aug-30-2023