JBA Upper A-arms for lifted WK/XK


JBA Upper A-arms for lifted WK/XK

Designed for a spring lift or leaveling kit.

This product currently ships in 20-30 days after order is received

We have a 100% satisfaction guarantee!

"If for any reason you’re not 100% satisfied with your JBA UCAs in the first 12 months, we will give you 100% of your money back, including the shipping cost!"

Made in the USA!

Featuring our JBA ball joint with 90 Degrees range of motion!

JBA Upper Control Arms are assembled and ready to bolt into your vehicle!



8 synthetic elastomer a-arm bushings retaining  washers

4 steel bushing sleeves

2 Upper Control arms, left and right with 2 JBA custom ball joints

2 Stickers

Installation Instructions


Made of heavy-duty tubing, red powder coat finish, with replaceable ball joints, 4 grease ports for JBA EZ lube bushings, and ball joint.

Note: Left and Right UCAs are symmetrical. 


Why synthetic elastomer bushings?

Synthetic Elastomer is a long-chained polymer with many urethane constituents. Over the years the formulation has evolved to yield stronger, yet softer compounds ideal for on and off-road applications. As the compound advanced to yield higher tensile strength, elasticity, and dynamic load capacity, JBA uses the bushing to help aid and tune suspension geometry and they will not squeak like polyurethane bushings.


The Ball Joint Range of Motion:

Up travel is 40 degrees off center line of the ball joint.

Down travel is 50 degrees off center line.

Full range of motion is 90 degrees.

Cerakote clear to protect the ball joint.


Do not fit the Superlift 4" kit, will fit if modified to 6" or 8" lift.

Do not fit the Rough Country budget lift, it lifts the front end over 22.50" (see below)

Max lift on the WK/XK is 4”
18.50” center of wheel to underside of fender flare is stock ride height.
21.00” is a 2.5” lift kit
22.50” is a 4” lift kit
over 22.50" the JBA UCAs will not work, you will not get a good front end alignment 

Only good up to 4" of lift (23" center of wheel to underside of fender flare)


JBA UCAs give you MORE!

  • More spring clearance is More suspension travel
  • More Caster
  • More Articulation
  • More Traction on the trails



STD A-arm tubing 5/32" wall and 1" diameter.


Installation time: 1-3 hours


UCA Maintenance:

We would recommend using a lithium-based grease, one pump of grease in each bushing. Three pumps of grease in the ball joints after the install and every 3000 to 5000 miles.


You will receive 5 emails, 1 per day for the next 5 days with helpful info to make a wise decision

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Custom Stock Status Available
Shipping Message This product currently ships in 20-30 days after order is received
Variant 1
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