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Whiteline Adjustable Rear Upper Control Arm w/ Mount (05-14 All)

Market Price $269.80 You Save 10% ($26.98)
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$242.82 (each)

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  • Item 54108
  • MPN# KTA141A

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Features, Videos & Details

  • Better Traction, Faster Launches, Less Wheel Hop
  • Adjustable Via the Eccentric Crush Tube
  • 4130 Chromoly Steel Tubing
  • Silver Powder Coat Finish
  • Synthetic Elastomer Bushings
  • Includes Rear Upper Control Arm and Mounting Bracket
  • Fits All 2005-2014 Mustangs

Review & Installation Video

Stephanie with and this is my complete breakdown of Whiteline's Adjustable Rear Upper Control Arms. As well as, a few different lower control options that will help you and your 2005 to 2014 Mustang. For those of you that do not know, Whiteline has a worldwide reputation as a leading manufacturer of suspension components that provide innovative solutions to suspension and handling constraints. Whiteline's products are known to deliver proven performance and provide significant gains in vehicle balance, steering precision, and grip level. Taking a look at some of the main suspension components we have here today, we all know that the upper control arm is very important when it comes to traction and handling performance. And also when it comes to being able to adjust your instant center and pinion angle, especially for those of you out there with lowered Mustang's and one piece drive shafts. Whiteline offers this adjustable rear upper control arm with the mount that will provide improved traction, allow for faster launches, and eliminate that dreaded wheel hop through a longer-than-factory arm length. This upper control arm is adjustable through this crush tube which is what's going to allow you to change your pinion angle and instant center adjustment, all without weakening the arm. This feature is what's going to allow you to dial in your Mustang's optimum settings for the best performance possible. And lastly, the adjustable upper control arm features a synthetic elastomer bushing that adds increased stability to the rear but without the harshness that we would normally see with the commonly used bearing designs. Whiteline currently offers three different types of rear lower control arms that will ultimately work with the upper control arms to offer even better performance. Two of these options, the fixed lower control arms and the standard adjustable control arms, are made from steel tubing for strength and stability, and feature synthetic Dual-Durometer Elastomer Max-C bushings with a multi axial composite design. As far as the Max-C bushings, the Dual-Durometer compound of the lower control arms helps dampen NVH. The reinforcement sleeve inside redistributes load to prevent binding or gapping and the PTFE Liner serves as a lubricating agent for a grease-free, silent operation. The fixed lower control arms feature forged ends, while the single adjustable lowers offer an on-car singular pinch-fold adjustment so you can dial in your settings as with the adjustable upper control arms. Our third option from Whiteline here are the Double-Adjustable Rear Lower Control Arms. These are made from tubular chromoly steel and have a non-bonded bushing design with a synthetic elastomer bushing that will allow the crush tubes to float freely. This eliminates bushing wind and snap-back, leaving you with increased handling predictability. As the name implies, the only other difference here is the dual on-car adjust-ability. Your choice here with the lower control arms, really depends on your current or planned setup and what you want to do with your Mustang. Either way, Whiteline has you covered. All of these options are relatively easy to install and if you look at them individually, you're looking at about an hour for the install with a bit more time needed for fine-tuning the adjustable options. And, of course, make sure you have your jack and jack stands ready. As always, be sure to reach out to a Mustang expert by phone or email if you have any questions regarding which option would be best for your build or even if you just have an install question. So if you want to improve your traction off the line, reduce wheel hop, and have the ability to adjust pinion angle, then you have to check out these options from Whiteline. Available right here from

Improves Traction And Handling. Replace your weak stock upper control arm with a Whiteline Performance adjustable rear upper control arm and mount for improved traction, quicker launches, and to eliminate "wheel hop" ensuring you're getting all your ponys to the pavement.

Adjustable. Unlike other aftermarket upper control arms, this Whiteline Performance arm is adjustable via the eccentric crush tube which allows for pinion angle and instant center adjustment without weakening the arm. This lets you precisely dial in your optimum settings to be sure you go straight down the track every time.

Synthetic Elastomer Bushing. This Whiteline Performance Adjustable Upper Control Arm uses a Synthetic Elastomer bushing that adds increased stability to the rear end without the harshness of commonly used bearing designs.

Superior Construction. Made from 4130 chromoly steel tubing for superior strength, this Whiteline Performance Upper Lower Control Arm features a longer arm length (which Ford incorporated in 2011) to reduce hop. Included is a heavy duty mounting bracket that adds increased rigidity to the arm.

Application. The Whiteline Performance Adjustable Rear Upper Control Arm with included Mounting Bracket is designed as a direct bolt-on upgrade for all 2005 to 2014 Mustangs including the V6, GT, Bullitt, and Shelby GT500 models.

Fitment: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

What's in the Box
  • (1) Upper Control Arm
  • (1) Mounting Bracket
Installation Info
Tech Specs
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • V6 - 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14

People Who Bought This Item Also Bought

Most Helpful Reviews

Whiteline Makes Great Parts

The Rear Upper control arm is a beautiful peice of hardware. dramatic improvement in traction and straight line takeoffs over stock. improved feeling of stability in the rear end under acceleration, turning ...

Read More
Helpful (2)

a lot of noise...

I purchased this along with the J&M adjustable panhard bar and the J&M lower control arms for the rear. I gave it a low handling improvement only because I installed it the next day after installing just ...

Read More
Helpful (2)

Overall Rating 4.5 out of 5 stars
Read All 26 Reviews

Customer Photos (6) Submit Your Photo

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2 Questions / 2 Answers

Ask a Question

My car is lowered 2" is there enough adjustment in this control arm to reach the correct pinion angle. Thanks


  • The Whiteline Adjustable Rear Upper Control Arm w/ Mount will have a more limited adjustment range than traditional adjustable control arms, and will most likely not accommodate 2" of lowering in the rear. We would recommend a traditional adjustable style for this application.

    Rob D

Helpful (0)

If I have no plans to lower my car, would it be better to use this UCA or a non-adjustable one. Thanks,


  • The adjustability gives you the freedom to set the car up to your prefered handling however if you are not running this car on the track and at stock ride height, I would suggest the non-adjustable control arms.


Helpful (0)

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Customer Reviews (26) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Handling Improvement 4.708333 4.7
  • Fit 4.708333 4.7
  • Bang For Your Buck 4.434783 4.4

  • 4/5

    Installation Time: Less than 1 Hour

    May 21, 2013

    a lot of noise...

    I purchased this along with the J&M adjustable panhard bar and the J&M lower control arms for the rear. I gave it a low handling improvement only because I installed it the next day after installing just the lcas and adjustable panhard bar and only noticed a slight improvement in wheel hop which eliminated the last little bit of it. which is the reason for bang for my buck being average. Now, the excessive noise. the newer mustangs have the weakest drivetrains. I work at Ford and we have drive driveshafts, transmissions, and SOME gears being replaced along with the whole axle under warranty. now idk if they slam gears or not but I know mine had a little clunking from the lot. the bushings in the upper control arm from whiteline don't absorb Alot of noise so you hear every single turn of the ring and pinion. I can turn the radio up just a bit and have a normal conversation over it and I won't hear it. but it's there so just be aware that these stiffer bushings will let more noise come through even though whiteline claims they don't cause any unnecessary NVH.


    Year: 2012 Submodel: GT Fayetteville, NC, USA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    February 28, 2013

    Whiteline Makes Great Parts

    The Rear Upper control arm is a beautiful peice of hardware. dramatic improvement in traction and straight line takeoffs over stock. improved feeling of stability in the rear end under acceleration, turning and braking. all the whiteline parts are the best you can get in Race Engineering they look great and work as advertised. its the one with the blue suspension.


    Year: 2010 Submodel: GT seattle

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    December 22, 2016

    Whiteline Adjustable UCA

    I installed this a couple of months back, and let me tell you that this piece combined with the LCA's is just amazing. it eliminated completely the wheel hop and the real axle feels solid. I can launch with confidence now, its just beautiful. highly recommend this.


    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    November 13, 2016

    Great Mod

    pretty cool mod, comes with the chassis mount so it's a great deal all by itself.. will recommend


    Year: 2005 Submodel: GT

    Helpful (1)

  • 4/5

    September 08, 2016

    Lacks adjustment

    I'm lowered 2" on coilovers and have a 1-pcs driveshaft. I was trying to achieve 2* degree pinion angle difference but could not achieve it. I was only able get it to 1.5* which honestly is good as well but I noticed the eccentric bolt maxed out and only had limited range. Other than that I've had it for about 2 years now with no issues whatsoever.


    Year: 2007 Submodel: GT

    Helpful (1)

  • 2/5

    August 26, 2016

    Very loud gear whine

    Installed FR 3.73 gears and this Whiteline UCA ... massive gear wine :( But the rear end is much more stiffer now ...


    Year: 2008 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    April 25, 2016

    Worth the investment.

    I won't lie to you, this was not the easiest install on jack stands, but it is definitely worth the effort. Getting the old mount out and reinstalling the new mount was challenging because of tight work space under the car. The difference, however, is immediate and wheel hop is a thing of the past. The car feels much more confident and the rear end is solid. Some mild higher pitched NVH at certain speeds, but after driving for a week it has settled some and isn't significant. This piece and Whiteline's LCA's are worth every cent.


    Year: 2012 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 10, 2015

    Quicker off the line

    Had a shop install with no problems. No real sounds change from inside the car.


    Year: 2013 Submodel: GT San Diego

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 16, 2015

    Solid feel!

    I got Ford to install this so they could set the pinion angle and so I didn't have to lay in my driveway messing about with the whole rear end, but it only took them an hour to install and set. When I got back in the car, I immediately felt the difference - the rear feels more solid when launching hard but is also noticeable on slow starts. I recommend you replace this if you do your lower control arms, as the stock upper one will take extra wear and stress. I go to the track a few times in the summer (road course), and I can't wait to abuse this part! :D


    Year: 2011 Submodel: V6 Oshawa, ON, Canada

    Helpful (1)

  • 3/5

    Installation Time: Shop Install

    May 29, 2015

    Works good, but adjusting could be better

    The adj crush drive, in my opinion is not as good as the bmr style, had cortex racing install it, and they were not sure how to adjust it, and said it has to be pre set when you install it, wish I went with bmr on this one ... There is now a whining sound in some of 5th gear, and most of 6th, I like all the other whiteline parts, not sure on the u a though


    Year: 2014 Submodel: GT Fresno, CA

    Helpful (1)

  • 5/5

    Installation Time: Full Day

    January 20, 2015

    Launch with Confidence!

    Probably like every UCA installation, it was not an easy mod to install. In addition, the adjusting mechanism of the eccentricity was not the most intuitive. After contacting the guys at Whiteline, they were able to provide me great help with the adjustment portion of the install. Somehow everything made sense from then on, I was able to set the pinion angle and the amount of anti squat that I wanted. After installation, I took the car out to Autocross and I was impressed to say the least. Wheel hop is gone and the rear is Planted. This product took the performance to a different level. As a daily driver, I did notice increase in vibrations from both the road surface and my stock drive shaft. The decibels from the vibrations are tolerable. NVH is more noticeable at lower than higher speeds. To recap, Installation was worth it. I'm very satisfied with the product. I highly recommend it!


    Year: 2012 Submodel: V6 Rancho Santa Margarita, CA, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 18, 2014

    Very satisfied cust

    It help to get my pinion angle perfect and no wheel hoop at all


    Year: 2014 Submodel: GT detroit, mi

    Helpful (1)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    May 15, 2014

    Whiteline rear upper control arm

    I have added several Whiteline parts to my GT 500 and the difference in handling is incredible. Upper and lower control arms, lower control arm extensions, pan hard bar, pan hard bar brace, and Eibach front and rear sway bar. Much more stability in the back end and helps keep the rear from sliding out after shifting hard into second gear. You will have a harder ride due to the stiffer bushings. But worth the improvement in handling.


    Year: 2007 Submodel: GT500 New Jersey

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    March 17, 2014

    Solid construction & fit, takes more effort than described to align

    The best feature about this part is probably the least explained in the instructions - how to use the eccentric hole for resetting the pinion angle. Once the stock part comes out - which is doable but took an impact wrench & patience, the axle tips forward so I was glad I researched elsewhere to note the stock angle before taking it apart. So to get the mount into the whiteline bracket takes an extra set of jack stands & a jack to pivot the nose back up so it reaches. The instructions gloss over this & how to use the eccentric to draw the nose back into line once they are together. OK, on to driving impressions. I was getting a healthy amount of chirp in the 2-3 high rpm senario as well as massive wheel hop just on loose snow & the part does as advertised. The back end doesn't scrabble around for traction. This part isn't a stand alone mod, tho - I added a stiffer sway bar to help with roll.


    Year: 2014 Submodel: V6 Indiana, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 24, 2013

    Easy to adjust when installed

    I chose this upper arm as I am a tech at a ford dealership and have installed several aftermarket upper arms and have had issues adjusting the pinion angle after the part is installed.the white line arm is adjusted with an eccentric at the bushing rather than pinch nuts and a sleeve this eccentric set up is very easily accessed and adjusted.have another 2007 gt which will be getting this part installed in the near future.


    Year: 2007 Submodel: GT Pensacola, FL, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 03, 2013

    Bye Wheel hop

    This UCA completely eliminated my wheel hop. I love this product.


    Year: 2013 Submodel: GT500

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 18, 2013


    The bushings in the Whiteline products are far superior to anything else out there. Install took some time because of the fuel tank. I installed these with Whiteline LCA's & LCA Relocate Brackets. These items are a must to improve handling of your S197. I would definitely recommend.


    Year: 2009 Submodel: GT Knoxville, TN, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    November 17, 2017

    Great trusted name and quality piece

    My only complaint it the eccentric bushing doesn’t have a lot of adjustment due to its design. I was able to get the correct pinion angle reguardless, just saying you don’t have the same amount of adjustment as a threaded screw.


    Year: 2012 Submodel: Other

    Helpful (0)

  • 5/5

    October 14, 2017


    Fantastic product that adds stability and control.


    Year: 2011 Submodel: GT

    Helpful (0)

  • 4/5

    Installation Time: Afternoon

    August 29, 2017

    hook and book

    Wish it came with some better instructions on how to per set the arm length. Only complaint is that is created a fare bit of noise and tunnel vibration to the car. But glad to have done the upgrade, car now lunches better and improved rear traction.


    Year: 2014 Submodel: GT

    Helpful (0)

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