In this video, we compare a stock exhaust to an aftermarket exhaust, to see what the differences are and why they sound different.
A stock exhaust, or OEM exhaust, needs to meet the government emission norms which is why they tend to sound a lot softer and less aggressive. However, an aftermarket exhaust does not specifically need to meet any regulation, except for safety, which is why those manufacturers have the freedom to design the exhaust the way they want.
To know more and what goes on inside an exhaust, check out the full video!
#stockexhaust #aftermarketexhaust #exhuastsystem #oemexhaust #exhuast #DriveSpark
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A stock exhaust, or OEM exhaust, needs to meet the government emission norms which is why they tend to sound a lot softer and less aggressive. However, an aftermarket exhaust does not specifically need to meet any regulation, except for safety, which is why those manufacturers have the freedom to design the exhaust the way they want.
To know more and what goes on inside an exhaust, check out the full video!
#stockexhaust #aftermarketexhaust #exhuastsystem #oemexhaust #exhuast #DriveSpark
~ED.157~
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NewsTranscript
00:00 So have you guys ever wondered of why an aftermarket exhaust sounds so much more aggressive, so
00:12 much more brutal than a stock OEM exhaust?
00:15 Well, in this video, we'll be speaking about that and we'll be talking about how an exhaust
00:20 system actually works.
00:22 Welcome to DriveSpark, I'm Vedant Johari and we are at NMW Racing to see how an exhaust
00:27 is actually built and how it performs.
00:29 So your exhaust has four main components.
00:32 Starting off, you have your header, you have your catalytic converter, then you have your
00:35 muffler and finally you have your end can.
00:38 So how does this work?
00:39 Well, you can think of it as how a furnace works.
00:42 The exhaust system works very similarly to an actual furnace.
00:45 So first off, in the manifold is where all your fuel gets burnt.
00:50 Then after your manifold, where your gases are produced and everything, it goes through
00:54 your headers.
00:55 So once the gas is passed through your header, they go into your catalytic converter.
00:59 Now your catalytic converter is where the main work of the exhaust takes place.
01:03 Now from the manifold, a lot of harmful gases are produced, a lot of sound is produced and
01:08 a lot of hot air is produced.
01:09 So once the gases from the manifold pass through your header, they enter your catalytic converter.
01:14 Now inside your catalytic converter, the main work takes place.
01:18 So firstly, a lot of the harmful gases from your manifold are reduced, a lot of the chemicals
01:22 are reduced and the sound is also reduced.
01:25 Being a hot engine, a lot of sound is produced with each compression.
01:28 Now in your cat, all of that gets negated.
01:31 Well, it gets negated to an extent, let's say, it doesn't go fully silent because there
01:35 is sound coming from every engine.
01:38 Now after your catalytic converter, you go into your muffler, all the sound is passed
01:42 into your muffler and finally from your muffler, it goes to your end can and that's where your
01:47 exhaust fumes are released and that's where the sound of the engine actually comes from.
01:51 So all in all, those are the four main components of an exhaust system and that's how the gases
01:55 are passed from your manifold all the way till it exits your motorcycle.
02:00 So now in my hand, I have a performance muffler made by NMW Racing.
02:05 So now let's talk about the difference between a stock exhaust system and a performance exhaust
02:09 system.
02:10 Right now, this is a performance muffler that I have and so as I said, after your catalytic
02:15 converter, the gases pass through a muffler and then your end can.
02:18 Now this is just one part and this technically consists of your muffler and your end can.
02:25 So if you look at it from inside, you have two parts, you have one smooth part and the
02:30 end part with glass wool.
02:33 So now once the gas is passed through your catalytic converter, it enters your muffler
02:37 from this end and it keeps creating cycles and compressions inside the main muffler and
02:45 after that, it exits from this end.
02:48 So now inside this that I have, you might just think it's a metal piece inside, but
02:54 no, half of it is metal and half of it contains this material called glass wool.
02:58 So now the glass wool inside this helps in two things, one in creating back pressure
03:04 and two in compressing the sound.
03:06 So you won't get a very loud sound nor will you get a soft sound.
03:10 At the end of the day, this is a performance exhaust, so your sound will be altered.
03:14 So now the back pressure that we have inside the muffler helps in creating extra power
03:18 for your motorcycle.
03:19 So how does that work?
03:20 Well, basically all the gases that are being cycled inside this, a little of it will be
03:25 sent back with a little bit of fuel back into your engine to create that extra bang.
03:31 So now you're back in the third compression, which is your bang.
03:34 So the air will go back into your engine, create the bang and then be sent out again
03:40 and the cycle just repeats.
03:41 So each cycle that you have, you will have back pressure going into your engine and coming
03:45 out again.
03:46 So all in all, this is the difference between a performance exhaust like the one I have
03:49 in my hand versus a stock OEM exhaust.
03:52 Let us know if you have any doubts or clarifications in the comment section down below and I'll
03:57 be more than glad to help you out.
03:58 Don't forget to like, share and subscribe.
04:01 My name is Vedant Johari, signing out.
04:03 (upbeat music)