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Coldwater, MI-  JKS Manufacturing adds to its control arm offerings with new J-Flex lower control arms for the front of the 1999-2004 Jeep Grand Cherokee WJ. These new J-Flex arms offer improved strength and performance along with adjustability to correct front caster on lifted applications. The arms are built from 2” OD x .250-wall DOM tubing, formed for additional clearance. At the axle mount these arms feature premium Clevite® rubber bushings to absorb noise and reduce vibrations for a comfortable, quiet ride and maitenance-free operation. At the other end the arms incorporate a unique hex-shaped threaded bung for to allow easy adjustment of the forged flex end and jam nut. This forged end uses 1-1/4”-12 threads to provide the ultimate strength and fine adjustments. The flex end design allows for 30-degrees of misalignment (15 in either direction) for impressive articulation. They are greaseable to ensure long bushing life and easily rebuildable if and when the time comes.  As with all JKS control arms, these J-Flex lower control arms come finished in a durable gloss black powder coat finish and are backed by JKS’s limited lifetime warranty. Upgrade your Grand Cherokee WJ’s front lower control arms with the new J-Flex arms from JKS Manufacturing. 

View other JKS products for your Jeep vehicle at

Bullet Points:

  • Built from 2” OD x .250-wall DOM tubing
  • Superior strength to OEM control arms
  • Adjustable design to work with a range of lift heights
  • High strength forged flex allows additional articulation
  • Premium Clevite® rubber bushings preinstalled
  • Durable gloss black powder coat finish
Product Info:
#JKS1653 (Front J-Flex Lower Control Arms for Jeep WJ, pair) - $350.00 msrp [more info]
1999-2004 Jeep Grand Cherokee WJ
Related Parts:
#JKS1695 - 1-7/8" jam nut wrench
#JKS1690 - flex end rebuild tool
#JKS1902 - large flex end service pack
Compatible with 0-4.5" of lift


JKS Manufacturing includes the Factory Protection Plus Program

  • 5-year, 100,000-mile Drivetrain Warranty
  • FMVSS No.126 ESC System Compliance
  • JKS's Limited Lifetime Warranty
About JKS:   Since 1989, JKS Manufacturing has developed some of the most widely used and respected products for Jeep vehicles in the off-road industry. From the original Quick Disconnect™ brand of quick-release swaybar disconnect systems, to the innovative ACOS Pro™ variable height coil spring spacer with integrated bump shock, JKS® only manufactures products that provide unquestionable benefits to vehicle performance. It's no coincidence that those who know Jeep performance best choose JKS products for their own vehicles.

© JKS Manufacturing, 491 W. Garfield Ave. Coldwater, MI 49036

(517) 278-1226 | |

Factory Protection Plus Badge

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

Limited Lifetime Warranty
Factory Protection Plus
  • 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 Drivetrain Warranty

A 5 year - 100,000-mile plus drivetrain warranty is available for Jspec equipped vehicles as a Supplemental Drivetrain Limited Warranty to match your new vehicle express drivetrain limited warranty Jeep. The protection applies to any Jspec eligible suspension systems purchased on or after November 1st, 2013.

Drivtrain 5year 60K Mile Protection
What is FMVS No. 126?

When you see the FMVSS Compliant Symbol you will know with confidence this application has been tested and successfully passed the Federal Motor Vehicle Safety Standard No. 126 compliance test. This highly specialized test was performed to prove the installation of the particular Jspec suspension system, with specified wheel and tire package will not compromise the performance and effectiveness of the vehicle’s Electronic Stability Control (ESC) system keeping you safer on the road.


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