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BBK Rear Upper and Lower Control Arm Kit (99-04 All, Excluding Cobra)

Item 56091
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      Review & Installation Video

      Hey. everybody, I'm Justin with, and in this video, I'm gonna be talking about a few upper and lower control arm options from BBK, available for your '79 to 2010 Mustang. If there's ever been one company that has truly flown the Mustang flag since day one, it's BBK. They've been showing their support for the Mustang and it's owners since the mid-80s, and show no signs of letting up anytime soon. As many of you guys probably already know, BBK makes a wide variety of parts for many different applications, including exhaust systems and cold air intakes, headers, and even suspension components like I'm talking about here today. Now the parts I have with me in this video consist of an upper and lower rear control arm kit, available for both your three and four link Mustang. So when ordering, just make sure you grab the right set for your generation. So the job of the rear upper and lower control arms is to brace and link the rear end of your Mustang to the chassis itself, and ultimately control the movement, hence the name control arm. Now the problem is the factory stuff contains soft rubber factory bushings that do a great job soaking up the excess noise vibration and harshness, but can often times leave a lot on the table when it comes to performance. Now this can cause problems such as bad wheel hop, poor traction, and inconsistent launches, just to name a few. The upper and lower arms from BBK are gonna improve on those areas I just talked about, thanks in part to the high-quality aircraft grade steel, precision welding, and most importantly, the high-performance polyurethane bushings. They're gonna help reduce any excess movement in the rear end, help you put that power down, and improve your handling in the process. Finally here, all the bars have been powder coated in the signature gray from BBK and do include greaseable fittings here to help prolong the lives of the bushings themselves. Since the kit from BBK does include both the upper and lower rear control arms you are gonna be spending a little bit more time in the garage, but overall the install shouldn't be that bad, maybe two out of three wrenches on the difficulty meter. Now we do call this one a full-day install on the site, but I wouldn't be surprised if some of you guys can bang this one out in six hours or less, just to get everything knocked out. So always guys, if you have any questions whatsoever, feel free to reach out to our team of Mustang experts here at AM anytime. They're always standing by ready to give you a hand. So if you guys are looking to put the power down, get off the line a little better, and improve your handling in your 1979 to 2010 Mustang, be sure to check out one of these kits from BBK right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Improves Traction
      • Powder Coat Finish
      • Polyurethane Bushings
      • Includes Both Upper & Both Lower Control Arms
      • Fit 1999 to 2004 Mustangs, Excludes IRS Cobra.


      Improves Traction. Drag racers know if you can't "hook up" at the track you are going nowhere fast. But with the BBK Rear Upper & Lower Control Arm Kit you will greatly improve traction and decrease your 60ft. times.

      Quality Construction. Both the upper and lower control arms are precision welded for extra strength and feature greaseable zerk fittings, polyurethane bushings, and are completed with a baked on powder coat finish for durability and good looks.

      Fitment. BBK Rear Upper & Lower Control Arm Kit comes complete with both upper and both lower control arms and are designed for use on the 1999 to 2004 Ford Mustang, excluding 1999 to 2004 Cobras with Independent Rear Suspension (IRS).

      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# 25260

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (38)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 38 customers

      Installation Time: Afternoon

      Installation Cost: $1000+

      • February 05, 2020

        5 1999 GT - Mike Installation Time: Shop Install

        Solid Product

        I've had these on my 1999 GT for approximately 20,000 miles now. Did my entire suspension setup in one go. This pairs well with the Eibach kit that is also available on this site. If you primarily use your car on the street, these will be just fine for you. Makes the rear end feel much more planted with noticeably less squat under hard acceleration.

        Helpful (1)
      • January 23, 2020

        5 1999 Cobra - AaronF Installation Time: Afternoon

        Great for mild build

        Put them on my 99 cobra with 8.8 SRA swap and all I can say is WOW. I had the stock LCA and UCA with really worn out bushing, it was bad enough to the point where the axel was sticking out the drivers side more than the passenger. Not only did this fix the problem but also the steering is much tighter around tight turns with both wheels staying planted, the only other suspension mod is eibach pro springs and it handles just as well as it did with a stock IRS, but without all the wheel hop !

        Helpful (0)
      • January 19, 2020

        5 2001 Bullitt - 01bullitt Installation Time: Weekend

        Great product

        Great product I did both on the weekend I even replaced the bushing on the rear differential gotta use the bushing tool removal tho

        Helpful (0)
      • November 18, 2019

        5 2004 V6 - Austin Installation Time: Afternoon

        BBK Rear Control Arm Kit

        This product is a 10 out of 10. Very firm feel when driving. Feels 100x better on the high way more control and grip.

        Helpful (0)
      • March 21, 2019

        5 1999 GT - ChristopherB

        Control Arms

        Much better traction. Big improvements. Installed in no time at all.........

        Helpful (1)
      • October 15, 2018

        5 2004 GT - ErickR Installation Time: Afternoon


        My car feels amazing when you do the turns I love them

        Helpful (3)
      • July 06, 2018

        1 1999 GT - Ridiculous Installation Time: Shop Install Installation Cost: $1000+

        Can't get parts

        that are also needed to install them I've been waiting several weeks now? Not happy yet but the parts that came look great sitting on the floor in my shop, doesn't do me any good if I can't get bushings for them...

        Helpful (5)
      • June 29, 2018

        4 2003 V6 - AlexW Installation Time: Full Day

        Good build

        The parts are solid and feel much better than stock, however they don't come with the bushings. AM didn't have the bushings for this either so I had to get those from another company.

        Helpful (7)
      • June 22, 2018

        5 2003 V6 - DaltonM Installation Time: Afternoon

        Very nice

        High quality but does not come with bearings still a great upgrade!

        Helpful (6)
      • March 31, 2018

        5 2002 V6 - William Installation Time: Afternoon


        High quality, strong materials. Looks great installed, goes well with energy suspension red poly bushing sets. Perfect fit, easy installation, future proof design with grease fittings in all bushings.

        Helpful (5)

      Questions & Answers (20 answers)

      5 Top Rated Questions

      Does the kit come with new bushings for the upper control arm where it bolts to the rear end?

      • This BBK control arm kit does come with all the bushings for the control arms needed for a complete installation.

      Helpful (4)

      I was considering getting the Bilstein quad shocks for my 2003 Mach 1 but wanted to know if this BBK control arm kit would eliminate the need for the quad shocks.

      • The BBK Rear Upper & Lower Control Arm Kit will certainly help with wheel hop and handling just as the quad shock would. You can certainly remove your quad shock if you would like after installing this kit and you will not notice any decrease in performance.

      Helpful (1)

      will these work on my 04 gt with the sr lowering springs I have the sr springs and was wondering if they will work without having adjustable uppers for the pinion angle ??

      • The BBK Rear Upper & Lower Control Arm Kit (99-04 GT, V6, Mach 1) will work with the SR Springs without having to adjust the pinion angle as the SR Springs are not an aggressive drop.

      Helpful (1)

      Will these work in conjunction with the Ford Performance Lowering B Springs?

      • You would be able to use these control arms with the Ford Performance Lowering Springs.

      Helpful (0)

      Do I have to add grease or are they ready to install out of the box

      • You will want to add grease upon install. 

      Helpful (0)
      10 More Questions
      I see some of the reviews are saying this kit does not come with the bushings. Is that accurate ? If so do you guys carry bushings for these ? 1 answer
      Do the upper control arms have a torque spec? Or can I tighten them son of a biscuit eaters down. I’m aware the lower control arms have a torque spec, I just wanted to make sure before I throw everything back together. Thank you in advance. 1 answer
      Does this come with the bushings installed? It says in the description that it comes with polyurethane bushings, but under what's in the box it shows the 4 control arms 1 answer
      Reading the product description, Its claimed that this kit comes with all needed bushings, yet, in some reviews, some have stated that they needed axle bushings? Can someone shed some light on this? I would like to put these on my 2004 Mach 1, I want to be sure I have every thing needed to complete the install. Plus, I was going to also purchase the "Eibach Premium suspension kit" with the 1.8 and 2.0 drop springs, etc, to be installed at the same time. Would this cause conflict with these control arms? Thanks in advance! Bill... 1 answer
      I’m running coilovers now. Probably 2 or more drop all around. Got these as a gift. Will they work or is car too low. Or can I use lower and buy an adjustable upper ?? 1 answer
      Was going to remove the quad shocks to install bigger rims. Would there be an issue if I only upgrade the lower control arms or do I need to upgrade both? 1 answer
      Will this kit work with the Eibach pro system plus will drop car about 1.1” what notes say? 1 answer
      Will these work with a drop of 1.7? 1 answer
      How much HP can these handle? 1 answer
      Will this arm kit lower my 03 Mach 1 with factory suspension? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Rear upper control arms
      • (2) Rear lower control arms

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04
      • V6 - 99, 00, 01, 02, 03, 04

      Does not fit 1999-2004 SVT Cobra's with Independent Rear Suspension (IRS)

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