It is imperative for a car of any type to get rid of its waste or excess gases because restrictions of such will lead to back pressure. Majority of the vehicles straight out the factory don’t come with a free flow exhaust system rather, it is using small diameter piping than what the vehicle actually needs. If you take a look at the exhaust manifold, you’ll notice that the bends aren’t bent in mandrel manner, creating better airflow.
As for naturally aspirated vehicles available today, it is best that you work first on its induction and exhaust prior to anything else. In the next paragraphs, you’re going to discover the different parts of an exhaust system.
Manifold/exhaust headers/branches – these are taking the gases from different cylinders and combining them into 1 pipe that is interconnected to another one underneath the car or called the head pipe. The best branches that you can find in the market uses mandrel bends and some are coated in ceramics for an improved heat reduction. There are several flow test performed on it as well to guarantee that the air is exerted in the best manner possible.
Head pipe – the main function of a head pipe is connecting the branches to catalyctic converter and then to mufflers. Normally, it has a straight path that doesn’t have much bends.
Catalyctic converter – this converts the dangerous chemicals like carbon monoxide, hydrocarbons as well as nitrogen into oxygen, nitrogen, water vapor and CO2. As we discuss its function in greater detail, you will see that this has beads/honeycomb that is coated in palladium as well as platinum. With this in the exhaust of the car, it is able to transfer the bad gases into good one.
Muffler – mufflers have one and one function only, and it’s to lower the loud sound made by the vehicle. It is able to do this by getting sound waves to bounce against each and therefore, cancelling them. If you will look closely other vehicles, it has a second muffler or two parallel mufflers even. The final muffler has couple of exhaust tailpipes that are also connected to it. This is mostly done for aesthetics purposes only especially when you see the tips to be chromed.
Tailpipe – it’s the last part of an exhaust system and it consist of piping from muffler all the way back. Whether you believe it or not, majority of the aftermarket tailpipes you can purchase today have a beautifully chromed tip that’s either single or double tip. Due to the reason that the piping should curve up and over the axle on the rear, you’ll typically find most bends on this location. As a matter of fact, there are some suppliers who go extreme with their exhaust like putting lights on the tips.