This is the X-Force Varex long tube catted headers with a cat-back exhaust system for
the 2015 and newer GT Mustang.
Now, this is something that you're going to want to check out if you're looking for one
complete exhaust system upgrade in one fell swoop.
So this kit offers a full stainless steel three-inch system with catted long tube headers
and the ability to change the sound and loudness of your exhaust on the fly from inside of
the car.
Of course, with materials and sound adjustment in mind, you're also getting a top-quality
system in terms of materials and fitment.
So this is going to be for someone that doesn't mind paying a little bit more for all of this.
The install for this system is time-consuming.
It's going to be about a day's work, and it's a full three out of three wrenches on the
difficulty meter.
You might not have heard of X-Force before, but they've actually been a very popular and
established brand down in Australia for some time now, where they originated.
The Varex is their patented system, and it's been around for a few years.
So I wouldn't say that this system is new to the game.
But if we break this system down some, let's look at the headers first.
First of all, long tube headers offer a few benefits as modifications.
You get both sound and power gains from a set of long tubes.
But of course, your current mods and your build plans will impact your exact individual
results here.
These catted headers are made from one and seven-eighths-inch mandrel-bent stainless
steel tubing, and it doesn't get any better than that material-wise.
This stainless steel has a polished finish.
But it's not going to change a whole lot over time, and it makes for one of the best looks
in the engine bay, in my personal opinion.
This finish is going to be a little bit different than a chrome, or even a ceramic-coated header
would be.
So it obviously has a polished appearance, but it's not quite the same appearance that
a polished chrome header would have.
While these don't have the ceramic coating either, they are stainless steel.
So they are going to hold up really well in all cases here.
Other than the general construction, the header flanges are three-eighths-inch to help prevent
leaks and give the headers some strength.
The primary tubes then merge down to three-inch collectors.
Then, after your catted connection pipes, you have your cat-back piece.
Like I mentioned earlier, this is a tunable exhaust, and I'll say that a lot of companies
have tried the tunable exhaust thing in the past with varying levels of success.
X-Force and Roush are the two companies that I think did a good job with this design.
You have options with the exhaust tuning.
You aren't stuck with either just open or closed here, and I'll explain more in a second.
Getting into this a little bit further, like usual with a cat-back, the main player of
this cat-back and the centerpiece is going to be the patented Varex mufflers.
They feature a mechanism, or a butterfly, within the actual muffler itself that functions
a lot like a traditional cutout would, and all of this is controlled by the included
remotes, which are right here.
Now, unlike their traditional cutouts that are generally fully open or fully shut with
no options in between, the Varex gives you the option to customize your sound with a
level of adjustment, essentially, giving you five different mufflers in one, as Varex likes
to put it.
This is achieved by opening the butterfly valve in different increments, which is going
to change the tone slightly along the way.
So there's a number of reasons why having full control of your exhaust tone and volume
might be appealing to you.
The most obvious would be to have the ability or option to be quiet when you want it to
be, or when you need it to be.
Say, you're entering or leaving a neighborhood or an apartment complex, or something like
that, and maybe you're driving by Johnny Law.
Or maybe you have your significant other in the car, and they just aren't a fan of a loud
exhaust.
Or maybe you're trying to play the role of a sleeper.
Whatever the case may be, a Varex will be able to help you out.
So let's talk about the build of the cat-back itself, because again you're getting more
than just the adjustable sound here.
For starters, you're getting full 304 stainless steel throughout this entire system, the best
material in my opinion when it comes to exhausts, especially when it comes to resisting corrosion.
So this cat-back will bolt right up to your three-inch connection pipes and continue the
three-inch diameter throughout the rest of the system.
This is all mandrel-bent and has very nice welds, and four-inch brightly polished slash-cut
tips.
X-Force also incorporates a mid-pipe resonator in this system to help round out the tone
here a little bit, in connection with the Varex Performance mufflers.
Now, the Varex Performance mufflers are chambered and that's where the butterfly valve comes
in.
With the valve fully closed, the exhaust goes through more of a chambered section of the
muffler, which is going to keep things relatively mild.
However, once open, the exhaust will take the path of least resistance.
Essentially, the muffler is going to be a straight-through muffler, which is going to
increase both sound and performance.
It's all operated by the key fobs that X-Force gives you.
X-Force gives you two of these, and they have two buttons on them.
One is going to be to open the valve, and one is going to be to close it.
Again, you can play around with these and figure out what kind of sound that you like.
The butterflies are powered by a 12-volt source.
X-Force includes a plug-and-play harness to get you up and running here.
The harness will plug into both mufflers using water-resistant plugs.
From there, it's going to be fished inside of the car and through the trunk to be plugged
into the 12-volt power socket inside of the center console.
This is a total plug-and-play deal here, guys.
When it comes to price, as you can imagine, you're looking at spending a pretty big chunk
of change here.
Long tubes for the S550 are expensive, and so are cat-backs.
So you're looking at a price tag of just over $2,300 for this.
But you have to remember a few things here.
This is a full, complete exhaust system upgrade with 304 stainless steel and an adjustable
cat-back.
These are all top of the line features in a well-made system.
As for the install on this one, I'm sure you guys expected this already, but this is going
to be a full three out of three wrenches on the difficulty meter and a day in the garage.
Now, I don't say this often, but if you don't have a helping hand or if you don't have much
experience, it might be better to just take the car to a shop for the install.
You can do this job on a jack and jack stands, but a lift would certainly make things easier
for you.
You're going to need a toolbox for this one, with an assortment of different sockets, wrenches,
and extensions.
When installing the long tubes, you're looking at things like disconnecting the steering
shaft, dropping the starter, and removing a motor mount.
Now, a lot of this install obviously requires working in some pretty tight areas.
So while everything is straightforward, getting access and maneuverability in these areas
is actually tricky.
Which is why you need to pull a motor mount on one side, so you can lift the motor and
get some more room.
As far as the cat-back goes, you're pretty much looking at the normal cat-back install,
with a few exceptions.
The cat-back itself is a normal cat-back install.
But then you have your wiring for the active exhaust.
When it comes to the wiring, again, everything is completely plug and play, so it doesn't
get much easier.
With the harness connected to the mufflers, run it up into the trunk, through the removable
grommet in the spare tire area.
Then, from there you need to get it to the center console area to be plugged into the
12-volt socket.
This might take you a little bit of time to do right, as you'll probably want to hide
the wire under the carpet for a clean install.
Wrapping things up here, this is the X-Force Varex long tube catted headers with a cat-back
exhaust system for the 2015 and newer S550.
I suggest you check it out more online right here at americanmuscle.com.
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