With the improvement of people's quality of life level, the car as a consumer goods also gradually into the household. But immediately come on these cars coming and going, I do not know if you have not noticed, some ass only one car exhaust pipe, there are some two, some even have four, which you know what is the difference? In fact, water is very deep inside, only the old drivers know.

Some people feel more behind the exhaust pipe represents the more expensive the car, a lot of time really is like this, but the truth is not true, you know the number of the exhaust pipe is determined by what right?

The main effect of the exhaust pipe is to discharge exhaust gas generated by the engine to, in addition, an exhaust pipe can also be a catalytic gas, i.e. the harmful gases into harmless gases. In addition, reducing the effect of noise.

In many people's subconscious, depending on the number of exhaust pipe emissions is not it? In fact, just one of the reasons displacement, four-cylinder engine is generally a car exhaust pipe, two six-cylinder necessary. But want to improve exhaust efficiency, in addition to pay more than an exhaust pipe, the exhaust pipe can also be made larger.

The other is the exhaust pipe of another very important "mute" function, and all that comes with a silencer on the exhaust pipe, so much the better an exhaust pipe.

Especially for those engine sports car, very violent, the decibel roar of their engines is very high, so we need more muffler. This is why you can see some sports tops the four exhaust pipes.

But now how much exhaust pipe seems to have become a symbol of high performance, high displacement, many car companies or owners face for consideration. They will modify their own, to make their car more than a few exhaust pipes, which look more on some of the grade.

So, now the number of the exhaust pipe is not so persuasive.