JKS Manufacturing Suspension Lift Kit 3-1/2" JSPEC With FOX Shocks 4-Door Jeep Wrangler JK 2007-2018
JKS Manufacturing JSPEC 3-1/2" Suspension Lift Kit with FOX Shocks for 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 and 2018 4-Door Jeep JK Wranglers.
This JSPEC 3-1/2" Suspension Lift Kit with FOX Shocks from JKS Manufacturing is the ultimate dual purpose suspension system for your 4-Door 2007-2018 Jeep Wrangler JK. It is designed specifically for the daily driver and weekend wheeled Wrangler. No additional components are required to create a well-mannered Jeep that can handle the daily commute as well as it handles the trails!
JSPEC suspension systems are also the perfect starting point for the off roader who wants to customize their JSPEC-equipped JK Wrangler with a modular design that can be upgraded with JKS control arms, brackets, steering upgrades, braces, gussets and speed bumps to tailor your Jeep’s performance to your needs. The components of this kit are all proudly manufactured in the USA!
JKS Manufacturing JSPEC 3-1/2" Suspension Lift Kit (EC100K) Includes:
- 3-1/2" front and rear dual rate coil springs
- FOX 2.0 Adventure Series shock absorbers
- JKS front adjustable track bar
- JKS front sway bar quicker disconnects
- Front and rear brake line extensions
- Rear track bar bracket
- Front and rear bump stop extensions
Front and Rear Dual Rate Coil Springs:
At the heart of any true Jeep suspension system are properly designed coil springs. Not everyone uses their Jeep for the same purposes. Therefore, you need a system which adapts to different terrains both on and off the road. By developing tuned sets of dual rate coils springs, JSPEC coils provide the best performance in any situation. Whether loaded down with gear for a weeklong expedition, running light for some rock-crawling fun or loaded with a few friends for a trip to the beach, JSPEC coils will provide the ride you want and the performance you need.
FOX 2.0 Adventure Series Front and Rear Shocks
A great set of coil springs is useless unless you have a set of shocks to control them. When developing a shock to work in harmony with the JSPEC coil springs, JKS went with the best, FOX. The FOX 2.0 Adventure Series shocks provide a quality ride and complete control no matter what terrain you tackle. The IFP (internal floating piston) design keeps the high-performance shock oil separated from the 200 psi nitrogen gas charge. This separation provided by the IFP eliminates oil aeration, to allow longer fade-free dampening performance. Paired with the set of JSPEC dual rate coil springs, these shocks offer impressive performance and the adaptability to handle any terrain.
JKS Adjustable Front Track Bar
When you think of adjustable Jeep track bars you think JKS. For years, Jeep owners the world over have trusted JKS adjustable track bars for their strength, fit, function and durability. For those reasons it is a no-brainer that a JKS front adjustable track bar be an integral part of all JSPEC JK suspension systems. The JKS adjustable track bar dwarfs the factory unit using durometer specific rubber bushings at each end of the bar for smooth, quiet operation. The 1-1/4"-12 threaded adjustable end provides fine-tune adjustability and superior strength when combined with the 1-1/2" x 3/8" wall DOM tube, CNC formed track bar. Adding an adjustable track bar versus a relocation bracket also keeps the JKs steering angles in-phase to provide great handling and keep bump steer in check.
JKS Front Sway Bar Quicker Disconnects
The flagship JKS Manufacturing product is the Quicker Disconnect. JKS was the originator of the sway bar disconnect concept. That original concept was perfected with the Quicker Disconnect design which still remains the best sway bar disconnect on the market today. Adjustable length and greasable with JKS-exclusive poly-flex ball, high-misalignment ends, the Quicker Disconnect is everything you want in a sway bar disconnect. Stainless steel mounting studs provide an anchoring point for each end of the links and allow for easy removal and installation. For JK Rubicon owners, additional hardware is included to bolt the sway bar link and allow you to take advantage of the benefits of these links while retaining the function of your factory installed electronic disconnecting sway bar system.
Front and Rear Brake Line Relocation
Bake line relocation is a necessity anytime a JK is lifted much over 2", especially with longer travel shocks. In most kits on the market these items are an after-thought, but not in the JSPEC kits. The JKS brake line brackets included in the JK JSPEC suspension systems utilize the factory brake line mounting holes and locating tabs. This ensures that the brackets won't rotate and eventually come loose. The brackets are designed specifically to work with the shock lengths used with each JSPEC system. The result is just enough length at full axle droop with minimal modifications to the factory routing.
Rear Track Bar Bracket
As with the front suspension, the rear requires modification to the factory track bar setup to compensate for the new ride height. While the front gets a new track bar, the rear is adjusted with a track bar relocation bracket. The relocation bracket was chosen here for a several reasons. First, by raising the track bar mount position at the axle we flatten the track bar angle and make a slight adjustment to the roll-center height, which improves handling and body roll. Second, the new track bar relocation bracket doubles as a factory axle bracket brace. The factory rear axle track bar mount has been a known weak link since the JK was first built in 2007. By making the new relocation bracket out of heavy-duty 3/16" steel and bracing directly to the axle tube, the factory bracket is reinforced and up to the task of handling the new lifted height of the JSPEC suspension system.
Front and Rear Bump Stop Extensions
The front and rear bump stop extensions, like brake line relocation brackets, are another component that usually doesn't get much attention with most lift "kits" on the market. The bump stop extensions in the JK JSPEC™ suspension systems are made specifically to maximize suspension travel while maintaining safe compression limits for both the coil springs and FOX 2.0 shocks. The front extensions are made from 2-3/4" billet aluminum while the rear extensions are made from heavy-wall steel rectangular tube. Both sets fasten directly to the axle and are made to hold up to the abuse your new JSPEC equipped JK is now built to handle.
Since 1989, JKS Manufacturing has developed some of the world’s most widely used and respected products for Jeep vehicles. JKS is proud to continue to manufacture all of its products proudly in the USA, using only premium grade materials and state-of-the-art machinery.
Order JKS Manufacturing's EC100K JSPEC 3-1/2" Suspension Lift Kit with FOX Shocks for your 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 or 2018 4-Door Jeep JK Wrangler from CJ Pony Parts today!
California Residents: Proposition 65 Warning
The factory suspension on your Jeep Wrangler is great for the highway, but if you want a little bit more capability off-road, we're gonna look at this 3-1/2" JKS Manufacturing Lift Kit, fitting your 2007-2018 4-Door Wrangler. This kit features an impressive list of components, including dual rate coil springs, adjustable track bars, draglink, lower control arms, brake line extension brackets, and all of the necessary hardware to get the lift installed. To keep your ride comfortable, this kit includes Fox 2.0 Adventure Series shocks for both the front, and rear. Last but not least, this kit includes the infamous JKS quick disconnect sway bar links in the front, to make disengaging the sway bar a breeze. So, today we're gonna be installing it on our 2016 Jeep Wrangler.
All right. So, since we use a lot of tools for this install, I'm not gonna go through the entire list. You're gonna need a good set of sockets, good set of wrenches, basic mechanic tools to get this install done.
All right, so we've got the Jeep up on the lift, the wheels and tires are off. We're gonna start with removing the track bar bolt. All right. The next step will be to remove our parking brake assembly bracket. And you can pull that down and out of the way. So, the next step will be to remove the brake line mounting bracket from both sides. We're also gonna remove this push pin retainer for the brake line, right here. We've got the rear axle supported, the next step is gonna be to remove the lower shock mount bolts. I've got an 18mm box wrench here, and an 18mm socket. The next step is gonna be to remove the upper shock mount bolts, there's two of them. We're gonna use a 16mm socket. And we can remove the shock. Now that we've got both shocks removed, we're gonna remove these sway bar links. Now we're gonna move on to the upper mounting bolt; gonna use two box wrenches.
Now that we've got all of our parts disconnected, we're gonna lower our axle down and make sure that we're not getting tight on any of our brake lines, any electrical hardware, anything like that, so just be careful while you're lowering it. Now we're gonna get the coil springs removed. Lower it a little bit more. They should pull out with ease. Make sure you keep your coil spring retainer. Make sure you put the coil spring retainer back on top of the new JKS coil springs before you install them. All right, we're gonna put our new JKS spring into place. And repeat the same step for the other side.
And the next step is gonna be to actually make another mounting hole for your lower sway bar link to reuse the factory links. You're gonna want to measure from the factory hole up 1-1/4", and make your mark. Now we're gonna take a center punch, make it a little bit easier for us to drill this hole. All right, now that we've got our holes drilled, we're gonna hit it with a little bit of touch-up paint. Next step is gonna be to add the bump stop extensions to the axle mount. All right, so now we're gonna install the rear track bar relocation bracket. With this kit you do have the option to weld on a reinforcement bracket, but for this purpose we're not gonna use this. So we're just gonna set this up into place. Now that we've got the bracket mounted up, we're gonna make sure we install the spacer and all the necessary hardware, loosely. Now we're gonna put the U-bolt around the axle tube. All right, now we're gonna put the hardware into this spacer bracket.
We're gonna go back and tighten everything down. Now we're gonna tighten up the spacer bolt. Now we're gonna torque the U-bolts to 65 foot-pounds. Do the same for the front. We're gonna tighten this down to 125 foot-pounds of torque. We're gonna tighten these up to 40 foot-pounds. And now you want to raise your axle back up so we can reattach the sway bar links. Now we're gonna reinstall our sway bar links. Now we're gonna install the brake line extension brackets. Remember to reinstall the brake line clip. Now we're gonna install the rear Fox shocks. Start with the top. We'll come back and tighten these up.
And now we're gonna start removing the bolts on the lower rear control arms to replace them with the JKS J-Link control arms. Now time to install the new J-link control arms. We're gonna come back and tighten these down. And now we're gonna repeat the process on the other side. And that just about wraps up the rear end. We're gonna tighten up this lower track bar bolt once it's on the ground, put the wheels and tires on, and start working on the front end.
Now we're gonna work on the front end. We're gonna start by disconnecting the axle mount side of the track bar, with this bolt. We're gonna place a pole jack under this side of the axle, that way when we pull the track bar bolt out, the axle won't droop to that side; make it a little bit easier for us. Now we're gonna remove the top track bar bolt. And now we're gonna move onto the draglink. We're gonna remove the nut off the top of the passenger side steering knuckle. And a little trick to this is to actually leave the nut on, and we're gonna hit this with a mallet. That way when it falls it doesn't fall on the ground. Now we can take the nut the rest of the way off. Now we're gonna loosen the collar on the draglink, that way we can thread this end out. And now we're gonna disconnect the lower sway bar links. Now onto the uppers. And we can get rid of these old links, as we have quick disconnects to reinstall.
Now, the next step is to remove the factory front brake line mounting bracket. Make sure you keep the hardware for that, you'll be using it later. And you're gonna want to do that for both sides. All right? And now we're gonna remove the four bolts holding on the drive shaft. And now we're gonna support the front axle with these pole jacks, that way when we remove the lower shock mount bolts, the axle doesn't droop. And now we're going to remove the lower shock mount bolt here using our 18mm ratchet and box wrench. Now we're gonna remove the upper shock mount using two 16mm box wrenches. And now we're gonna lower the front axle, that way we can remove the front springs. Now we're gonna mark the center of the coil spring pad, that way we can put our coil spring bump stop extension. We'll use a punch to start our hole. Now we're gonna drill a 5/16" hole. Now we're gonna tap the hole with the provided hardware.
All right. Now we're gonna install the front coil springs. It might be helpful to grab an extra set of hands to help you do this. We're gonna set the coil spring extension in place and thread that into the hole that we made. And now we're gonna drill the drag link mount on the steering knuckle, out to 7/8". The kit actually provides a step bit, so we're gonna use that. Make sure you use lubrication and you try to drill as straight as possible for this. And now we're gonna put the sleeve into the hole that we just drilled. All right. And now we're gonna thread our draglink flip kit into the adjustment collar here. For the drag link flip, you're gonna want to make sure that the same amount of threads are exposed on the draglink as they are for this end that's attached to the Pitman arm. So as you can see, we have them pretty close. Once we get it onto the ground we'll really align it and get the steering wheel straight. And now we're gonna put this end of the draglink back onto the steering knuckle. And instead of coming up from the bottom like factory, we're gonna come in through the top. Make sure you use the provided washer and locking nut. And we're gonna come back and tighten this all down then.
Now we're gonna torque the bolt down to 63-foot-pounds. And now we're gonna install our new track bar bracket in the front. We're gonna use the factory hardware in this lower mount. Make sure you put the 1-3/8" spacer in between. Now we're gonna install the factory hardware in this lower mount, and we're also going to use this 1-3/8" sleeve provided with the kit. Now we're gonna put the u-bolt on around the axle tube. And we're gonna go back and tighten everything up. All right, now we're gonna torque the 3/8" hardware down to 40-foot-pounds. Now we're gonna tighten the original track bar bolt down to 110-foot-pounds.
So, the new track bar bracket actually comes with a new steering stabilizer mount on it, so we're gonna remove it from the factory location here, and put it up onto this mount. Now we're gonna loosen this nut. Now we're gonna bolt the stabilizer up. We'll come back and tighten this down. Now we're gonna tighten up this end. While we're at it, we might as well tighten down this collar here. Once we get it onto the ground we'll have to take it to an alignment shop and get it properly aligned.
Now we're gonna install the front track bar. A good starting point according to JKS, is at 32-1/2", so we've set our track bar to that. Once we get this thing on the ground we'll really dial it in and get it set to the right length. Now we're gonna mount the track bar into the frame side using the factory hardware. And now we're gonna get the front sway bar links ready to be put in. We're gonna start by putting these studs into the lower and upper mounts. I'm gonna start with the lower. First, apply a little thread locker onto the threads. And you're gonna want to make sure that you put the stud towards the inside of the Jeep, with the nut being towards the outside. All right. We're actually gonna use a punch to put it into this hole here, that way it stays still while we're tightening it down on the other side. Now we're gonna torque it down to 65 foot pounds.
Now we're gonna move on to the top mount. Once again, we're gonna put a little thread locker onto here. Now we're gonna torque it down to 65 foot pounds. And we're gonna put the pins in here just so that way we don't lose them. Once the Jeep is sitting on the ground we'll adjust the sway bar and links to proper ride height. Now we're going to install the front brake line extension brackets. All right. So now we're going to install the front Fox shocks. Start with the top mount. We've got the front Fox shocks installed. We're gonna move onto the lower control arms. Gonna start with this bolt here. Get both of the bolts removed and replace them with our new J-link control arm.
Now we're gonna install the new JKS J-link control arms. Make sure that the bend on them actually faces the outside of the Jeep. So, on this side the bend will face out towards the driver's side. All right. We're gonna reinstall the drive shaft. Put a little thread lock onto the drive shaft bolts. Now we're gonna torque these down to 81 foot pounds.
Now the Jeep is back on the ground, we can install our new sway bar end links from JKS. All right, and your installation is finished.
All right. So, we just finished up the lift on our Jeep. Totally transformed the look of this thing. We got 3-1/2 more inches of clearance. It's gonna be great out on the trails. Before we take it out we're gonna get it properly aligned, that way it drives straight. Install pretty simple at about 6-8 hours. And I'll see you out on the trails.