Whats the difference between the JBA STD and JBA HD Toyota UCAs

JBA STD Toyota UCAs for the Tacoma, 4Runner & FJ Cruiser VS JBA HD Toyota UCAs for the Tacoma, 4Runner & FJ Cruiser

First I will start with the STD (standard duty) a-arms, they were designed for the weekend worrier who worked hard all week and wants to play hard on the weekends with his Toyota.  The JBA UCAs will give you 1" extra down travel on the front suspension with more ball joint travel and strut spring clearance.

JBA Tacom upper control arms JBA STD Toyota a-arm

The JBA STD A-arm tubing is 5/32" wall and 1" dia. with a Moog style K6292 ball joint. On the JBA HD (heavy duty) A-arms are thicker tubing, with 3/16" wall and 1-5/16" dia with 11ga guests on the bushing bongs. The HD a-arms are for more extreme offroad abuse like offroad racing, rock crawling and dune jumping.

JBA UCA with Fox Coilover JBA HD Toyota a-arm

JBA Upper Control Arms with Fox Coilover

Both STD & HD will work with the Fox extended travel coilovers and the JBA Coilovers.

If your steering knuckle is reinforced get the JBA HD a-arms.

If you jump your Toyota you need the HD a-arms, If your steering knuckle is reinforced with a weld on gusset you need the HD a-arms.

The Ball joint range of motion
Up travel is 40 deg off of center line of the ball joint, down travel is 50 deg off of center line. Full range of motion is 90 deg. Note: you will not get that kind of extreme travel with a uni-ball joint


More spring clearance is
More suspension travel
More articulation, See JBA vs Uniball
More traction on the trails
More Caster
JBA UCAs give you MORE for your money!!

In conclusion the JBA STD a-arms are for a daily driver/weekend worrier the JBA HD a-arms are for extreme offroad use.

The JBA Upper A-Arms, upper control arms (UCAs) were designed for your lifted Toyota Tacoma "05" Plus, 4Runner "03" Plus, FJ Cruisers "07" Plus and will directly replace your stock upper a-arms. The original equipment a-arm (UCAs) hits the spring,  on Toyota Tacoma with a lift kit. The JBA A-Arms are compatible with all the lift kits on the market today! These A-Arms (UCAs) were designed to fit Toyota Tacoma, 4Runner, FJ. Made of heavy duty tubing, red powder coat finish, with replaceable ball joints. The A arms (UCAs) are assembled and ready to bolt onto your Toyota Tacoma, 4Runner,  or FJ.

Sold as a set, 1 left & 1 right UCA.

Both HD and STD UCAs will give you more caster!

Toyota Tacoma Caster with JBA UCAs

17 thoughts on “Whats the difference between the JBA STD and JBA HD Toyota UCAs”


    do you have full set ?

  • Tyler

    For tacoma uca's
    Do you ship to nova scotica, if so would you know the shipping cost postal code is b0w2s0.

  • Steve

    Are the HD upper control arms available for 95-04 Toyota Tacoma?

  • Brian

    I am confused... Why do the ball joints look different in different photos? Some look like dark metal and some look like shiny metal. What ball joints come with the std arms and what come with the hd arms? Why are there 2 different replacement ball joints? What is a moog ball joint and how dose that differ from the other ball joint other then price? Please answer all questions. Thanks.

    • Marlin Gehman

      In 2007 we started making UCAs using Moog ball joints. At one time Moog was the go to for aftermarket replacement parts. Moog is now importing a lot of there product lines and the quality has drop below our JBA standards. We originally introduced the Toyota UCAs with the dark metal Moog ball joints and now have made the switch to our own JBA shiny ball joints. All the Toyota a-arms have the JBA ball joint in them when we ship the orders. Some of the pictures on our web site are out of date with the old Moog joints.

      We copied the hole pattern and the fitment of the Moog K6292 but we gave it 90 degrees range of motion for the offroad applications and we make them in Pennsylvanian. We are proud to have our a-arms made in the USA.

      You can buy a Moog K6296 at any auto parts store in the US in an emergency situation and get back on the trails. The price difference is Moog is making hundreds of thousands of these ball joints overseas and we are making 400 a month.

  • Cliff

    Do both STD and HD give you 90 degrees?

  • Cliff

    Also regarding lower control arms and cam bolts on 05-11 Tacoma's do you guys have any recommendation, experience? Was looking at the moog but as you said on the website their quality is not what it used to be, I've checked out total chaos etc, im looking for something closer to OE rather than high performance lca.

  • Mark

    I read in you description that you will need different wheels if running 16" rims and 285 tires. Will the STD High Caster JBA UCA's work with a Lifted 2018 TRD Pro with factory 17"x8" wheels and 285/70/17 tires?

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