Is the Dual Exhaust Useful?

After becoming a fashion phenomenon in the car industry globally and the market of used cars for sale in the UAE, the claims are that dual exhaust enhances the car it equips. This artifice suggests a significant power and is sailing crazy!

But technically speaking, when is a dual exhaust justified?

An exhaust begins right out of the engine with the exhaust manifold. It is a metal assembly connected to a line of cylinders at the level of the exhaust valves. The manifold combines several orifices (generally 3 or 4 for the most common) into one, like rivers that meet in a sea. 

In the end, we have a single pipe and a single exhaust outlet.

In the case of a V engine (from V6 to V12, it’s the same) or a flat one (open V), we have two exhaust lines linked by the crankshaft. Therefore, we need two exhaust manifolds and two exhaust lines. 

In this case, the double outlet is necessary and natural, although it is possible to combine them before the exhaust outlet to merge them.

We notice that most cars with a dual output are those of 4 cylinders in line. Here it is a useless and expensive artifice because it takes more material to build a pot with two outlets.

Single Exhaust

The exhaust systems are very important because they keep air pollution from your tailpipe. There are three types of single exhaust systems:

• Straight-through
• Staggered
• Side exit

A single exhaust system is the best because the exhaust gases flow straight through the exhaust pipe instead of splitting into different parts. 

• The most common type of single exhaust system is called a straight-through system. With this system, both exhaust manifolds connect directly to the tailpipe. Thus, the exhaust gas meets at the same point where the tailpipe connects to the engine. However, some exhaust gases bypass the catalytic convertor and remain outside the vehicle. 

• Side exit systems are less popular than straight-through systems, but they are great if you want your car to look sportier. 

They let the exhaust gases escape the exhaust pipes at a right angle. The problem with side exit systems is that they do not allow the heat exchanger to collect enough exhaust gasses to function properly. Another drawback is that they cause a lot of noise. 

• Staggered systems are similar to side exit systems, except their position is slightly off-center. Both staggered and side exit systems give you more space to add accessories like spoilers and lights.

Dual Exhaust

A dual exhaust system helps collect the leftover air out of the cylinders faster, allowing the next exchange to start quicker. 

The size of the camshaft and the timing is essential here if you want to get more exhaust out at one time to enjoy more horsepower. 

Useful

As we mentioned earlier, the dual exhaust is a must with any V6 and above. Nevertheless, a dual exhaust system can increase the horsepower of a four-cylinder engine as long as it is supercharged.

A Dual exhaust system allows the turbocharged engine to breathe better with the right converters, mufflers, and proper piping.

Thus, a dual exhaust system increases the power and lifts the car valuation in the UAE with a compatible engine.

Useless

Adding a dual exhaust to a non-turbocharged 4-cylinder engine does not affect the horsepower. However, it gives the vehicle a “cool look”, but nothing more.

The dual exhaust adds to the overall coolness of the vehicle. It makes the vehicle look great, especially in the United Arab Emirates. For those who have a high-end vehicle, this is worth considering!

Dual exhaust systems give extra power, but they’re typically only worth considering if you already have a turbocharged engine. Otherwise, they may cause problems such as noise issues.

The bottom line: a dual exhaust is definitely useful. The only exception comes in a 4-banger model.