I'm Ryan from extremeterrain.com, and this is my review and installation of the Rock
Krawler X Factor Lift Kit System, fitting your 4-door 2007 and up JK.
Today, we're gonna talk through the installation of this lift kit, which is going to be a two-out-of-three-wrench
install.
This is an involved installation.
You are going to have to tear apart the vast majority of your suspension in order to get
this installed, so you are going to have to have a lot of tools and a lot of time.
About four hours to get this installed, but it is still something you can do in your driveway.
If you're not comfortable doing this level of work, that's okay too.
You can certainly take your Jeep to a shop and have this installed, but we'll talk more
about the installation in just a second.
We're also going to talk through the construction and a few of the features of this kit.
This lift kit is for those of you looking to add 3-1/2 inches of lift to your JK to
be able to run a 35 or even a 37-inch tire, especially with flat fenders, and are looking
for a kit that is very well-built, that is very complete, and you have the budget for
it.
This kit's gonna be around $2,100 without shocks, and you are going to need new shocks
for a 3-1/2-inch lift.
But this kit is also going to give you excellent ride and handling characteristics on the road
as well as a ton of articulation and a ton of performance off-road.
This is also going to be built from components that are going to hold up incredibly well,
both on-road and off-road.
So if you have the budget for it, if you're looking for a very complete kit and you want
that performance, I think this is going to be a great kit to take a look at.
However, if you're on the flip side of that coin, you just wanna run a 35-inch tire, you're
staying on the road, doing some real mild off-roading, and you don't need or want the
performance that this kit offers, there are going to be some less expensive kits that
I would steer you toward.
But if you want what, in my opinion, is one of the most complete and one of the best-built
kits available, I think that you're looking in the right place.
So again, this is the X Factor System from Rock Krawler, which is their most complete
kit.
This is going to include all eight controls arms.
It's going to include both front and rear track bars as well as the rest of the components
you need to lift your Jeep.
If you're looking for a kit that includes a few less components, but still very high-quality
components and is still very functional on and off-road, you can look at the Max Travel
Kit.
That kit can always be upgraded to this kit by adding those additional components.
But if you want something that, right out of the box, has everything you could wanna
add into your suspension, other than full axle assemblies, this is going to be an excellent
option to look at.
Now, right over here, you start with your springs.
Again, these are going to be provide 3-1/2 inches of lift, and this is going to be a
progressive rate spring.
And what that allows is for a very tall, uncompressed length, which is going to ensure that all
the way through the suspension travel and all the way through your articulation you're
still going to have some spring left.
You're not gonna run out of spring.
You're still gonna have weight pushing on the spring, which is pushing on the tire,
giving you traction.
If you have a shorter spring, as you articulate, there's no more weight pushing on that axle,
and therefore no more traction coming from that tire.
So these springs are a very tall, uncompressed length, and they're going to give you a ton
of off-road performance as well as a comfortable on-road handling.
These springs aren't going to be a big piece of your handling.
It's mostly your shocks.
But again, because you are getting a progressive rate, you're going to get a bit of a softer
spring rate when you're on the road, which is going to give a nice, comfortable ride.
Now, moving over to the control arms.
As I mentioned, this kit includes all eight control arms, all replacements.
These are all going to be adjustable control arms, so that you can dial in your pinion
and your caster in the front and your pinion angle in the rear.
And these are also going to be spherical joints on your control arms, which means you're not
going to have that rubber bushing that can bind as you're trying to articulate off-road.
These are going to give you a ton of articulation.
The spherical joints are all re-buildable, they're all greasable, and these are very
strong, heavy-duty control arms.
So as you're dragging them over the rocks, as you're dropping off of ledges, these are
going to hold up to any abuse that you can throw at them.
Now, getting back to the pinion and the caster angle.
You don't need all eight control arms in order to adjust your pinion and your caster angle,
and the Max Travel Kit has sort of the bare bones that you would want in order to adjust
those angles.
You're gonna wanna get your pinion angle in front and rear back to a factory-like spec,
so that you don't have any driveline vibrations or prematurely wear out your driveline components.
And you're gonna wanna get the caster angle up front set properly, so you don't have that
flighty feel when you're driving down the highway so that your steering wheel wants
to re-center.
Having all eight control arms is, of course, beneficial, though, because as I mentioned
before, you're getting spherical joints on all these control arms.
You're going to get the maximum amount of articulation and suspension travel with having
these control arms installed.
And moving on to what we have back here, which are going to be both your front and your rear
track bars.
Now, the Max Travel Kit just includes your rear.
With this X Factor, you're also getting a very beefy front track bar that is, of course,
adjustable.
These also have spherical joints on both ends, so they're not going to bind up or limit your
suspension travel or articulation.
And out back, you're also going to get a very beefy track bar bracket.
This bracket is going to move the mounting location to more of a factory mounting location.
It's gonna flatten out your track bar angle a little bit, help with your roll center.
It's going to give you back some of that factory handling characteristic that you would otherwise
lose by adding a big lift onto your Jeep.
And this track bar bracket mounts in quite a few different locations.
It's going to mount to the factory track bar location, it's going to U-bolt around the
axle, and it mounts in one other spot.
So you're not going to have any sway in the back of the Jeep.
Sometimes, when you raise the track bar mounting location, if the bracket's not really solid,
it can actually move a little bit and you can feel that going down the road.
This is a very well-built, very solid track bar bracket.
You're not going to have any of that sway from this system.
And again, having the adjustable track bars in front and rear ensures that you're going
to get your axles perfectly centered in both the front and the rear of the Jeep.
Over here, you have an adjustable front sway bar end link, which is also a quick disconnect,
so you have all these spherical joints and all these control arms, all these track bars.
Everything's gonna be able to move really nice off-road, but if you have your sway bars
connected, that's gonna be your limiting factor.
So this is going to be an adjustable end link that will allow you to get your sway bar angles
proper, and you can also very easily disconnect them when you go off-road, taking advantage
of all the articulation and travel that you get from the rest of these components.
This also comes with this nylon strap that you'll mount to the Jeep, so when you have
that sway bar end link disconnected, you can swing it up out of the way, strap it so it's
not gonna fall down and bind or get bent in the suspension as you're off-road.
This Kit, the X Factor, also comes with an adjustable rear sway bar end link, not quick
disconnect because you wouldn't want to do that when you're off-road.
You can get a really unstable feel in your JK, so you're gonna wanna leave the rears
connected, which is why these are not quick disconnect.
But again, they are adjustable, so you can get that sway bar angle dialed in exactly
where you want it so that doesn't become an issue when you are off-road.
Finally, this kit is going to include all four soft brake lines.
Now, there are kits on the market that will just include a bracket to move where the hardline
is mounted on the frame, so you can get away with using the factory soft lines.
I don't like that, especially on the front of the Jeep, because in order to use those
brackets, you'll often have to straighten out the factory bends and the factory hardlines,
which I'd just rather not do.
So having a new set of lines like this is something I really like.
I feel like it's the right way to modify your brake system, so that it works with your new
taller suspension.
Now, it does add a little bit to the cost of the lift kit, and it also adds a little
bit to the install because now you're breaking open your hydraulic system.
You have to then bleed out the brake system to make sure everything's gonna work properly
again.
But as I said, I think that that's the right way to do it, so I like that these are included
in this kit.
As I said, this kit includes a lot of components, pretty much everything that you would wanna
add to your suspension if you're going with a standard control arm length suspension setup.
And not only does it include a ton of components, they're all very, very high-quality components.
These are gonna last, they're gonna handle abuse on-road and off-road, they're gonna
give you a great ride and performance both on-road and off-road, and it's just a very
nice, very well-put-together kit.
As I said before, the install for this kit is going to be a two out of three wrenches.
You're gonna wanna give yourself around four hours to get it bolted up.
If you're not somebody who's comfortable with suspensions, with lift kits, you've never
done one before, you can still do this in your driveway, but just know it's probably
gonna take you a few additional hours.
You are gonna have to take every tool you have out of your toolbox to get this done.
It is fairly involved, and there's no shame, if you're not comfortable with doing this,
in taking your Jeep to a shop and having them install your lift kit for you.
Now, the first step in the install is, of course, jacking up the Jeep, supported by
the frame, so that you can lower or disconnect everything that keeps the axles from completely
sagging down.
That's going to be your track bars, your sway bar end links, your brake line brackets, and,
of course, your shocks.
Once all those components are removed or loosened, you can sag the axles down, pull the coils
out, reinstall your new taller coils.
Now, before you put weight back on the axles, that's the time that you're going to wanna
install all your control arms.
First, you're going to wanna adjust those for length, based on the parameters that Rock
Krawler gives you.
Then remove your factory control arms one or two at a time and go ahead and put your
new control arms in place.
At the same time, while there's no load on the axle, that's when you'll swap out your
track bars and, of course, install your track bar bracket.
And then, once there is load on the suspension, again, you'll go ahead and install your sway
bar end links.
At that point, you can also install your new brake lines and go through all of your proper
brake bleeding procedures.
So you really are going to be touching about every piece of your suspension component by
installing this kit, so you are going to need every tool at your disposal and quite a few
hours, four or more, to get this installed.
This lift kit comes in at right around $2,100 without shocks, and you are going to have
to add shocks because this is a 3-1/2-inch lift kit.
So this is one of the more expensive kits that we offer.
It's also, as I've said over and over again, one of the most complete kits, and it is built
with very high-quality components.
So I feel like I might be overselling this, but at the same time, I don't think I am.
This is a very well-built kit that's very complete.
If you have the budget for it and you want a kit that's gonna perform on-road and off-road,
I would definitely recommend considering this lift kit.
So if you're looking to add a lift onto your JK to run a larger tire, but you also want
a kit that's going to perform very, very well on-road and off-road and that's made up of
components that are very well-built and are gonna take some abuse, this is going to be
a really nice kit to take a look at, although you are going to have to have the budget for
it.
So that's my review of the Rock Krawler X Factor Lift Kit System, fitting all 2007 and
up JKs, that you can find right here at extremeterrain.com.










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