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Jspec™ Suspension Systems for 2007-2014 Jeep® Wrangler JK

2.5" and 3.5" Complete Suspension Systems


JKS Manufacturing is no stranger to Jeep® suspension. With 25 years in the business, we have been engineering high quality  Jeep® suspension solutions since 1989 with the development of the original swaybar disconnect, a simple yet innovative solution to improving offroad capability by increasing wheel travel. Over the years the goal hasn't changed as JKS's team of engineers and enthusiasts continue to develop components to improve the performance and capability of Jeep® vehicles introducing some of the worlds most widely used and respected products. To this day, JKS components are being utilized throughout the industry as a top-quality supplementary solution to many of the inherent flaws with other suspension systems in the goal to improve performance, handling, and offroad capability. The quality and adaptability have made JKS a premier choice among Jeep® owners.

The trial-and-error process of choosing individual components can be incredibly frustrating and far more expensive than selecting the right parts from the beginning. JKS Manufacturing set out to develop a full line of suspension systems, reinventing the idea of incomplete pieced together component kits and developing complete, easy to install systems. After many years of development, testing and fine-tuning, JKS Manufacturing is proud to announce the release of the Jspec™ Suspension line, offering true dual purpose suspension solutions engineered to provide premium on road comfort with unrivaled offroad capability.

Jspec™ Suspension launches with 2.5'' and 3.5'' systems designed specifically for 2007-2014 Jeep® Wrangler and Wrangler Unlimited JKs with other systems coming soon after. Systems are ready to install right out of the box and feature detailed step-by-step instructions along with video tutorials to guide you through the process. Each package can be further customized to suit your individual performance requirements with optional accessories designed by JKS for Jspec™. Every Jspec™ Suspension package delivers exceptional value and is backed by American quality, workmanship and the JKS Lifetime Limited Warranty.

Each Jspec™ Suspension system is designed with you in mind with top quality components working together in unison for exceptional performance on any terrain.


Why Jspec™?

Jspec™ Suspension by JKS products deliver American Ingenuity and Workmanship to consumers without compromising performance or dependability. Jspec™ Suspension by JKS are comprised of JKS Manufacturing components, the best and most trusted Jeep® accessories in the industry.

Specifically Jeep®

The Jspec™ Suspension by JKS represents Jeep®-specific engineering at its best. With more than 60 years of combined experience centered around this iconic 4WD legend, our expert team of industry specialists understand the Jeep® lifestyle inside and out.

American Made

While many of our competitors are having their products produced overseas, we remain committed to manufacturing and assembling every Jspec™ Suspension product here at home. When we say that Jspec™ Suspension products are "Made in USA", that is exactly what we mean.

Key Features:

  • Dual Rate Coil Springs
  • FOX Evolution 2.0 Gas Shocks
  • JKS Adjustable Front Track Bar
  • JKS Quicker Disconnects
  • Superior Handling Both On And Offroad
  • FMVSS No. 126 Certified
  • Full Color Easy to Follow Instructions and Installation Videos
  • Attactive Packaging for safe Shipping, Handling, and Display of Systems
Jeep Wrangler JK Jeep Wrangler JK

What Makes Jspec Suspension Simply Superior?



Right from the start, every Jspec™ Suspension by JKS product is designed for trouble-free operation and dependable performance. We strive for elegant simplicity because unexpected complications can quickly turn any adventure into a disaster.


Jspec™ Suspension by JKS products are always developed to enhance the Jeep® ownership experience. Our customers rely on their vehicles for so much more than off-road performance and we guarantee our products to excel in all environments.


Front and Rear Dual Rate Coil Springs

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 that adapts to different terrains both on and offroad. 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 Evolution Series Front and Rear Shocks

Fox 2.0 Evolution 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 we went with the best, FOX. The Fox 2.0 Evolution 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

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

JKS Front Sway Bar Quicker Disconnects

The flag-ship 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 swaybar link and allow you to take advantage of the benefits of these links while retaining the function of your factory installed electronic disconnecting swaybar system.


Front and Rear Brake Line Relocation

Front and Rear Brake Line Relocation

How much can you say about brake line relocation? Well, it 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™ systems. 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 were 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

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 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

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 were 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.


FMVSS No. 126 Certified

FMVSS No. 126 Certified

Meets or exceeds D.O.T. FMVSS no. 126 Regulations. Drive on pavement to and from the trails with confidence knowing that Jspec™ Suspension by JKS have been thoroughly tested and proven not to interfere with Jeep® stability control systems…Simply Superior!


Vehicle Protection

Factory Protection Plus

Jspec™ Suspensions are backed by the JKS Lifetime Limited Warranty and your Jeep® is Covered by the Factory Protection Plus Program. There is no need to wait for the factory warranty to expire before making your Jeep® an off-road beast.


Jspec Commerical

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JKS Jspec   JKS 100K - 103K   JSpec Kit 2
JSpec Kit 4   JKS JSpec   JKS 100K - 103K

JKS Manufacturing Contact Info

For more information on JKS Manufacturing and Jspec Suspension Systems, head to or call (517) 278-1226. 
Factory Protection Plus Badge

The Ultimate Lifted Suspension Protection Coverage and it’s FREE!

Limited Lifetime Warranty

All JKS products are protected by a limited lifetime warranty to ensure they are free from manufacturer defects in material and workmanship so you can go with confidence knowing your JKS parts are covered.

  • - 5 Year, 100,000-mile PLUS Protection
  • - Free, no cost protection for JKS customers
  • - Could save thousands on possible repairs
  • - Easy online application process
  • - Available for most late model vehicles
Drivtrain 5year 60K Mile Protection

When you see this symbol you will know with confidence this application has been tested and successfully passed the Federal Motor Vehicle Safety Standard (FMVSS) No. 126 test. This highly specialized test was performed to show the installation of this particular J-Rate suspension system, with a specific tire and wheel package would not compromise the performance and effectiveness of the vehicle’s Electronic Stability Control (ESC) system.

Drivtrain 5year 60K Mile Protection

The cherry on top for the industry leading Factory Protection Plus Program is the Supplemental Limited Warranty offered at no additional cost to the customer. This warranty is designed to supplement the factory drivetrain warranty on each vehicle and provides the extra peace of mind knowing your Jeep is protected. All J-Rated lift systems include this supplemental coverage to match either the factory 5-year/100,000-mile drivetrain warranty offered.


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