Hello everyone and welcome to this week's video today, I'm gonna be explaining exhaust headers
and uh exhaust headers are basically one more step if you are working on getting a full new exhaust with larger diameter of piping throughout it
So if you haven't yet watched my video on cat back exhaust or my video on how to increase horse power via the exhaust should probably check out those first,
i'll include links in the description
Now this particular exhaust header is a Yonaka header for Acura Integra
b-series engines and so I'm just gonna be kind of going over this and how these
are used to increase horsepower
so the exhaust header is the first piping after the exhaust from the engine
exits through the cylinder head and starts to leave out of the car,
so the purpose of a performance exhaust header is clearly to increase horsepower
Now it does this with two main ways:
first of all, it's going to have larger piping so for example with this Yonaka
header it's going to have one in five eighths piping for
the primary pipes coming out and then it is also going to have a 2.5 inch
collector, the collector is where all of the individual types join together and
then go out to the exhaust as one throughout the rest of the system.
So, the other thing this does is it supports scavenging, so the longer these long
tubes support exhaust scavenging so if you've watched my video on how exhaust
can be used to increase horsepower
you should be able to understand that as far as how scavenging is done in
order to increase horsepower.
So one of the things that's common with after market exhausts, especially
in the Honda Acura Japanese market world where we've got four cylinder engines is
a four-to-one header or a 4-to-2-to-1 header and basically all that is is describing
how the piping joints together and finally forms into one
so the 4-to-1 you take all four and then they just go to one just like the name
is when the 4-to-2-to-1 two of the pipes joined together and then finally the only
after that so little difference and I look at some dyno charts online just
kind of see some main differences here and it doesn't look like there's a huge
main difference but the powerband shifted a little bit hotter with the 4-to-1
rather than the 4-to-2-to-1
so this is a very exaggerated curve here, but basically you have torque on one side
and RPM on the other the 4-to-2-to-1 header is going to kind of have its peak torque
a little bit lower rpm than the 4-to-1 header and once again at the
graphs I looked at online it didn't seem to be a huge difference so it's not
anything major like I've shown here and then both of them seem to have a decent
advantage over the stock if you did have an engine with a significant amount of
power. So of course with these kind of things with the larger piping you're
going to want to match it to your horsepower so it's not necessarily if
you have very little force arranging getting larger header may not be
beneficial and I kind of go more into this in my video on catbacks that's kind
of why I reference checking that out, but Yonaka says the header that they
supply is good for about five to 10 horsepower on the stock engines and of
course that's more effective if you have a more powerful engine.
One of the things with these pipes is the large you create these individual
pipes and larger the collector is your kind of shifting where the peak torque
is going to occur to a higher rpm so larger piping you're going to have a
better flow at higher rpm when you've got a lot more flow so it'll kind of
shift that torque that peak torque up into the
higher rpms. Some of the challenges involved with an exhaust header,
especially one with longer length pipes is that the install can be kind of a
little more complicated
where you may have to remove some components, move components and also
weld the end on to the catalytic converter or the rest of the exhaust
that you've got going on
also you can run into clearance issues especially with lower cars as this
exhausted or maybe the lowest part in your car and so if that's the case you
want to make sure that's kind of protected or that it's not really that
low for the area that you're driving in
so just taking a look at this Yonaka header, this is a stainless steel header
and you can see the one and five-eighths inch piping heading down and that all
means up to a collector and then at that collector you've got a 2.5 inch piping
and that's the outer diameter so the inner diameter is actually little bit
smaller and then here is where you can i install the o2 sensor.
I can just place that right in there.
So, thanks for watching if you have any
questions or comments feel free to leave them below and I will include a product
include a product link in the descrition