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R.E. Extreme-Duty Long-Arm Bolt-In Upgrade Kit, TJ Wrangler

The Bolt-In MetalCloak Lock-N-Load Long Arm Upgrade Kit replaces the problematic Rubicon Express radius arms that are notorious for bind that limit travel, destroy bushings and fatigue the factory brackets.

What do you mean "there is no turning back?"; shouldn't your suspension take you where you want to go again and again? Unhappy with "lifetime replacement" for bushings that are now too stiff, squeak, or ride harsh?

Turn back and get the drive-ability you had always hoped for on and off-road, increase wheel travel, and get all of this without the worry of the documented failure of the Rubicon Express bushings.

The MetalCloak Lock-N-Load Bolt-In Upgrade Kit (featuring Duroflex Joints) for Rubicon Express suspensions are designed to permanently fix the problems found with that Radius arm suspension; this solution provides more articulation, better ride quality, a quiet experience, and outlasts the RE product with the durability you had originally hoped for.

There is no other company that can compare with the performance, comfort, and reliability of MetalCloak. Period.

* Lock-N-Load™ Radius Arm, Duroflex™ Control Arms featuring Patented Duroflex Bushings (

Note: MetalCloak Recommends You Have a Suspension Specialist Align Your Jeep Once MetalCloak Suspension is Installed.

100% of 100
Availability: Usually Ships in 1 to 2 Weeks
Product Code: 7149

Learn More about the Lock-N-Load >>>


Yes, the Radius Arm is now better than ever!

Bolt-In Upgraded Lock-N-Load Front Control Arms:

  • Fit perfectly into the existing RE Belly pan on TJ/LJ Wrangler and XJ models.
  • Adds Duroflex "bind free" rubber bushings that are "squeak free" and do not get pounded out.
  • Allows smooth up and down wheel travel while keeping the pinion angle in check.
  • Provides unmatched on and off-road handling characteristics that are just unbeatable.

We have new technology that solves an old problem:

Old technology Radius Arms have a single major problem... BIND. This bind causes premature bushing wear and undue stresses on the axle brackets that also limits free travel.

To make a Radius Arm work properly we created the Solution... please read on.

Radius Arm
Radius Arms Featuring the Lock-N-Load

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The Lock-N-Load solves the problem of the inherent bind of Radius Arm systems.

When a solid axle articulates by dropping one wheel while raising the other, one side of the solid axle will rotate forward and the other side backwards; the short length fixed control arms on a radius suspension limits this and puts a tremendous strain on all the related components.

  • Eliminates Radius Arm Bind
  • Dual-Purpose Control Arm
  • "Lock It" for Daily Driving
  • "Load It" for Trail Articulation
  • Built with Duroflex™ Joints
  • Exclusive Patented Technology (
  • Articulate like a 3-Link, but with the safety of a 4-Link

Watch the video>>>

Standard Tube FEnder Clearance

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This upgrade system combines the vibration dampening of the Duroflex Joints with the rock solid durability of 4130 Chromoly.

RE Design Lower Front Control Arms
Lower Front Control Arms

Both the Front Radius Arms and the Lower Rear Hi-Clearance Arms are manufactured for the ultimate in strength and versality.

  • 2" .25 wall DOM
  • Signature Gold Zinc Chromate (video)
  • Duroflex Joints on all ends for maximum misalignment and vibration dampening
Made strong and made to last!

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RE Design Lower Rear Control Arms

MetalCloak properly engineered the rear 4-Link. The RE Bolt-In Upgrade kit includes lower rear control arms with the built in Dog-Leg feature for greater clearance.

Long rear control arms work great but they sure do drag and hang on obstacles; that's why we made our lower control arms with a high clearance bend to optimize the functionality.

Our design eliminated the typical unsteady "Long Arm Roll" felt on a lifted Jeep while cornering - and that's without running a rear sway bar!*

And bolts directly into your RE belly pan with no modification.

*sway bars are recommended in most cases.

Lower Arms, Bent for Extreme Clearance

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The next step in our evolution of the Radius Arm Suspension is the Patented Duroflex™ Joint ( -- the key to getting the greatest off the shelf flex & on the road ride quality in a TJ/LJ Wrangler suspension kit. Period.

OEM Clevite and Typical Flex Joint is the Duroflex Joint

MetalCloak has taken the best features of the most widely used control arm joints and combine those features to create the Duroflex Joint, producing a Low-Maintenance, High-Misalignment (34˚), Self-Centering, Rebuildable Joint with an OEM quality ride.

OEM Style Clevite Joint Typical Flex Joint MetalCloak Duroflex Joint
  • High Vibration Dampening
  • Self-Centering
  • Fused at Center Bushing
    (No Bearing Surface Wear)
  • High Transverse Flex
  • High Rotational Flex
  • Rebuildable
  • High Vibration Dampening
  • Self-Centering
  • Fused Center Bushing
    (No Bearing Surface Wear)
  • High Transverse Flex
  • High Rotational Flex
  • Rebuildable

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MetalCloak's Duroflex Joint provides 28˚ more articulation and flex then typical control arms! (video)

Duroflex Control Arms Articulation Low ARticulation Joints.

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Control Arms 2.0" OD DOM x .25" Wall Steel Tubing
Duroflex Joint Proprietary Vulcanized Rubber
Lock-N-Load 2 1/2" .120 Steel Tubing
Total Weight 80 lbs
Available in Gold Zinc? Yes
OEM Clevite and Typical Flex Joint is the Duroflex Joint
Installation Difficulty Easy
Body Modification Cutting & Welding
Time to Install 4 - 5 Hours
OEM Clevite and Typical Flex Joint is the Duroflex Joint


At MetalCloak we work continuously to give you the best possible installation instructions. We constantly take customer feedback and look at how we can make the instructions better for you. Click below to see our full list of installation instructions.

Click Here to see a full list of MetalCloak Installation Instructions.
OEM Clevite and Typical Flex Joint is the Duroflex Joint
100% of 100
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