The exhaust pipe - the engine gas expeller

The exhaust pipe. I know. Why am I talking about this part? All it does is spew smoke and(sometimes) makes rude farting noises. Though, the exhaust pipe is more than what the eye meets. It isn't just a tube of metal that transfers waste gases away from the engine. In fact, it is the bringer of awesome car sounds, plus it also has a part called the catalytic converter which is currently saving the world from already becoming pollution hell. Sure, there still is pollution, but in the times when catalytic converters weren't there, it was smoggy hell. Okay, enough of talk. Let's get to the subject.

Exhaust pipes were there in every internal combustion engine, so you don't have to fret about another long paragraph about its history. Actually, it doesn't have a history.


An exhaust pipe is a long metal tube that transfers waste gases from the engine into air. It consists of 4 parts: an exhaust manifold, metal tubing, catalytic converter and silencer.

An exhaust manifold consists of an number of pipes depending on the number of cylinders i.e 4 cyl = 4 pipes. These pipes are joined to a specially shaped manifold joining piece which directly fits on to the engine's exhaust ports. All the manifold pipes join to a singular pipe and carry on to the catalytic converter to get the toxic gases filtered. The manifold also has to withstand a lot of heat, so materials like steel, iron and many other heat-resistant materials.

A catalytic converter is the most important part in the exhaust system. When there were no catalytic converters, it used to be very smoky and there were lots of harmful chemicals from car engines in the air. Thankfully, we have CCs (short form) now. A CC consists of a hollow oval metal shell. Inside, there is metal mesh covered with a layer of platinum. The platinum acts as a catalyst and turns the harmful chemicals: hydrocarbons, carbon monoxide and nitrogen dioxide into: water, carbon dioxide and nitrogen.

The exhaust tube just carries the gases to the silencer and exhaust outlet. Period.

The silencer of the exhaust is the last part of it. The silencer, well, silences the car's exhaust rumble. Idiots called 'ricers'* usually cut off the stock silencer and they think that it sounds cooler than the exhaust with the silencer. They're wrong. It sounds so awful its like someone has squeezed their butt up the pipe and let loose an amplified fart. Exhaust pipes can have one, two or four outlets. Some silencers are not silencers at all, but are mad, flame-spitting sound amplifiers. That is the beauty of exhausts.

*Ricers are people who only make cosmetic mods to their car. Making the car look horrible is their speciality.

I will end this post here. I will write more about car parts.

Happy driving!