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ReadyLift® Suspension 4" Max Flex Short Arm Lift Kit is no longer available
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ReadyLift® Suspension 4" Max Flex Short Arm Lift Kit for 07-17 Jeep® Wrangler Unlimited JK 4 Door

Increase your Off Road ablity with an incredibly great ride! That is exactly what the new ReadyLIFT® Off Road Suspension Jeep JK Wrangler Max Flex System does! ReadyLIFT® has spent over a year developing what we guarantee is the best short arm Jeep JK system on the market today. From the trails of Moab and Rubicon to the extreme rock gulleys of Big Bear, we have pounded, thrashed, twisted and thottled this system to the max to insure that what we offer to you Jeep owners is the absolute best short arm flex kit on the market.

Check out the optional AEV ProCAL Module, a great finishing touch to any lift kit as it can reprogram your vehicles computer compensating for gear ratio and tire size changes after lift kit installation not to mention many other additional features.

The ReadyLIFT® Off Road Suspension 2007-UP Jeep JK Wrangler Max Flex system combines the best engineered solutions to create the ultimate 4.0" Lift Short Arm Flex Kit. This kit changes the description "To The Max" entirely! If you have wanted a kit that features the best of everything, the ReadyLIFT® Off Road Suspension Max Flex System is it!

The heart of the system is the development of beefy 1-3/4" - 5/16" DOM tube steel front and rear control arms which have been teamed with the absolute best and strongest flex joints on the market - the Currie Original Johnny Joint®. No other joint on the market can compare when it comes to getting Maximum Articulation. The 4.0" of front lift and 3.0" of rear lift is achieved with ReadyLIFT® progressive wound Off Road coil springs. This lift includes heavy duty extended length front and rear sway bar end links that do not compromise on road handling nor maximum flexing qualities. Additionally, they also include a new heavy duty rear track bar relocation bracket to aid in correcting important suspension geometry.

  • Bolt On Installation - No Modifications Required
  • Tough Silver and Black Powdercoated Finish
  • Includes Original Currie Johnny Joints® - fully servicable with a tough zinc plated finish
  • 4.0" Front Lift - 3.0" Rear Lift - Progressive Wound Coil Springs
  • Provides Maximum Articulation - No Binding or Limitations Even In The Most Extreme Flexing Situations
  • 1-3/4"-5/16" Heavy Duty DOM Tube Steel Control Arms
  • Includes 3/16" Plate Steel Rear Track Bar Bracket to Correct Roll Center and Bushing Alignment.
  • Allows for up to 38" Tires with 4.5" backspacing wheels or less
Installation Notes
Installation Difficulty:
Level 3Advanced
Installation Time: 5-7 hours
Parts Included

Control Arms
Coil Springs
Track Bar
Front Sway Bars
Rear Sway Bars

  • Features: Adjustable Control Arms
  • Lift Height (Lift Kits): 4, 4.00
  • Shocks Included: Without Shocks
  • Max Tire Size: 37
  • Lift Height Range: 3 - 4.5 inch
  • Included Parts: Brake Line Extensions, Bump Stop Extensions, Extended Brake Lines, Front Lower Control Arms, Front Upper Control Arms, Rear Lower Control Arms, Rear Track Bar Bracket, Rear Upper Control Arms, Sway Bar Endlinks
  • Jeep Wrangler Unlimited 4-Door (JK)

  • 2017 Jeep Wrangler Unlimited 4-Door (JK)
  • 2016 Jeep Wrangler Unlimited 4-Door (JK)
  • 2015 Jeep Wrangler Unlimited 4-Door (JK)
  • 2014 Jeep Wrangler Unlimited 4-Door (JK)
  • 2013 Jeep Wrangler Unlimited 4-Door (JK)
  • 2012 Jeep Wrangler Unlimited 4-Door (JK)
  • 2011 Jeep Wrangler Unlimited 4-Door (JK)
  • 2010 Jeep Wrangler Unlimited 4-Door (JK)
  • 2009 Jeep Wrangler Unlimited 4-Door (JK)
  • 2008 Jeep Wrangler Unlimited 4-Door (JK)
  • 2007 Jeep Wrangler Unlimited 4-Door (JK)