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 – this is taking the gases from the cylinder of the car’s engine which combines it to 1 pipe that is interconnected to the head pipe which is found underneath the car. Best branches in the market are using mandrel bends and some even are coated in ceramics for improved heat reduction. In addition to that, they are flow tested to ensure that it flows the air out in the best way.
Head pipe – the main function of a head pipe is connecting the branches to catalyctic converter and then to mufflers. It is pretty normal to see it not having much bends and follow a straight path.
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. In return, this is making chemical reaction that converts the bad gases to good ones.
Muffler – the job of the muffler is deadening the loud sound created by the vehicle. The muffler does this by forcing the sound waves to bounce against each; this process cancels the noise. Actually, many cars have second mufflers or sometimes two parallel mufflers. The final muffler has couple of exhaust tailpipes that are also connected to it. Mufflers with chromed tips don’t have much use because it is oftentimes just there for aesthetics.
Tailpipe – this is the last part of the exhaust system and has piping from the vehicle’s muffler and all way back. Aftermarket tailpipes that you’ll find in automotive shops have a very attractive chromed 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. In fact, there are suppliers that even put lights onto the tips of their exhaust.