CFMOTO 450MT IBEX | Catalyst Delete (De-Cat) + Uncle Wang Exhaust (eBay)

Two-Wheeler Technology
5 followers
54 Video Views·Apr 20, 2026
In this "episode" I will attempt to show you why and how I replaced the stock headers with the ones I acquired through eBay from China. The new kit has a simple resonator instead of the catalyst. It also does not have a bridge between the two ports so less backpressure is provided to the adjacent cylinder.
Overall, the installation is relatively simple if you do not count the complications around the O2 sensors. With the right tools, one person can do it in a matter of a couple of hours, or less if you are not making the same mistakes and going through many thought processes like I did.
In my quest for better range and better performance basically, I decided to get rid of
the cat. Yeah, not the meow one, but this one. Now, to get rid of this, you basically have to
disassemble the whole section of the exhaust, this whole section, up until the muffler in the back.
And I'm not planning to change the muffler. I think I like it, so I'm gonna keep that.
But what I'm gonna do is place this whole thing, which includes taking off the O2 sensors,
which are a little bit of a pain to take off because they're in a tight spot. Plus,
it's like this thing gets very hot and then cool and hot and cold. And yeah, I'm already
having trouble getting these off because of that. They're kind of welded together a little bit.
Anyway, what I'm gonna do though is I'm gonna apply heat down here, concentrated hopefully
down here, and then try to undo this. And afterwards, I'll use anti-seize on the new parts
so that this gets to be easier next time, hopefully. This one is actually better. The
other one is the way in there. And yeah, this will be trickier. But I think it won't be a big deal.
After I do those two, I'll start undoing the exhaust manifold up here. And then I'll do this
muffler bracket here. And then lastly, I'll need to do... I'll show you this part here.
So it's a little bit hidden, but it's not too bad. You should be able to get to it. Yeah,
there's also room for the other side. So yeah, so that will be the last thing I'll undo and
hopefully take the whole thing off. The parts that I'm putting in are here actually. It's just
like pipes basically. So this is for the front. This is where the O2 sensor goes. This is another
one for the front O2 sensor. And obviously, this is the big one. Yeah, so yeah, there's also some
sorry, also a little bit some pieces here of the kit. Oh yeah, this one comes with these
springs that you attach down there with the rubber over there, which I'm a little bit
skeptical about, because this thing probably will heat up quite significantly. And I think
that rubber could catch fire, so I'm not going to use that. Instead, I'm going to use exhaust paste
to link these together. And I'll use maybe naked springs instead of the rubberized ones.
Like, I don't really understand why. Interesting. And these are plugs. If you want to get rid of the
O2 sensors, you can use these plugs. They'll fit, but yeah. They're all stainless steel, as you heard,
so should be good stuff. Hopefully, this will open things up a little bit more and allow the bike,
the engine, to breathe easier and get me more gas mileage, meaning more range, and
also a little bit more power, hopefully. I might need to do another ECU remap, but
not a biggie. I know a guy who does it pretty well, so yeah. And by the way, we're using AlienTech for
that, and it works very well. All right, like I said, I will start by applying heat carefully
to this part here, and then what you'll also need is a 22mm wrench. That's pretty
slim up here, actually. I had a wider one. I had to buy this separately, but I had the wider one
and it wouldn't really fit up here so that you could actually do anything but hit the exhaust
here, the exhaust pipes, instantly. So yeah, you need a slim 22mm wrench. Okay, so that worked,
but now this thing is really hot, so you don't want to touch that with your hand, but it's totally
loose too, so that's great. Yeah, you see, it's turning. And next will be the tricky one. So this
one was really tough, really tough to undo. It's undone now. You can, just trust me, it's still hot,
so I don't want to touch it a lot, but it was worse than this one, definitely. This one is now
not so hot anymore, so yeah, I can actually move it by hand. Anyway, what I ended up doing with
this one was not just heating it with the heat gun, I also had to use this. Let me show you.
It's a freezer spray and I used it on the actual bolt here. So I would heat up this part here
and then I would spray it on this part here, on the bolt itself. It's a bad angle. It's very
tight in here. So yeah, so spray it on this thing here and then put the wrench and yeah, elbow grease.
That's what you need. So yeah, these are undone now. Next step, undo these. Well, clean them first.
So the old exhaust is out with the cap and yeah, I also had to take off the muffler
to take it out of the exhaust side here. Man, what can I say? It wasn't that easy,
but it wasn't too difficult either. But what surprised me is the weight difference between
these two. This one I already know has two kilos, but this one pretty sure is at least double, if not
triple the weight of this new D-Cat one. So let me try to weigh this. Let's try if we can actually get it right here.
Okay, let's see what it says. Yeah, well, it's not triple. It is double the weight. 3.8, let's say, kilos.
So yeah, test fitment shows that it's not too bad at all actually.
Seems like it'll fit. So what I need to do next is I need to figure out how to
put these two sides together properly. I don't want to use the springs. Instead, I will be using
a exhaust system cement. Hopefully, that'll keep things together without rattling and
additional weight put onto it. So let's do that. So putting everything together was a bit tricky,
I won't lie. Especially because the sensors, the O2 sensors, are now more inward towards the engine.
That poses a little bit of a challenge now, but not too bad. It's just that I wanted to get as much
of the twist out of the cable as possible, and the cables are really tight. They're not
very long, so you cannot do much about it. But anyway, it looks pretty good, I would say.
Could be better, could be worse. But yeah, almost the complete system is now on, so
just the muffler missing. Once I install the muffler, I'll start it up, see how it runs.
The new exhaust without the catalytic converter is mounted. The question remains, will it start?
Will it run? Let's see.
It appears so.
