JBA HD High Caster Upper A-arms for Toyota Tacoma, 4Runner, FJ Cruisers, Lexus GX470, Lexus GX460 2003-Current


JBA HD (Heavy Duty) High Caster Upper A-arms for extreme use! 

Toyota Tacoma 2005-Current

4Runner 2003-Current

FJ Cruisers 2007-Current

Lexus GX470 2003-2009

Lexus GX460 2010-Current

The JBA HD A-Arms are compatible with most spring lifts or leveling kits on the market today!

This product currently ships in 3-7 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 not 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.

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.



HD A-arms are thicker tubing 3/16" wall and 1-5/16" dia with 11ga guests on the bushing bongs

Please Note: 285/75R16 (32.8" x 11") and 255/85R16 (33.1" x 10.0") and larger diameter tires need aftermarket wheels with 4.5" back space.  https://tiresize.com/calculator/

Wheel recommendations for 285/75R16 (32.8" x 11") and 255/85R16 (33.1" x 10.0") and larger diameter tires

7.0" wide use 6 to 12 offset = 4.25" to 4.50" back space

7.5" wide use 0 to 6 offset = 4.25" to 4.50" back space

8.0" wide use -6 to 0 offset = 4.25" to 4.50" back space

8.5" wide use -12 to -6 offset = 4.25" to 4.50" back space

9.0" wide use -19 to -12 offset = 4.25" to 4.50" back space


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.


JBA UCAs give you MORE!

  • More spring clearance is More suspension travel
  • More Caster
  • More Articulation, See JBA vs Uniball
  • More Traction on the trails


Installation Time: 1-3 hours

As seen in fourwheeler.com Magazine!
Installation Notes
install time: 1-3 hours
Get more info on our JBA Upper Control Arms for the Toyota 4Runner, Tacoma, & FJ Cruiser
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Custom Stock Status Available
Shipping Message This product currently ships in 3-7 days after order is received
Variant 1