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J&M Extreme Joint Rear Lower Control Arms - Black (05-14 All)

Market Price $203.44 You Save 13% ($26.54)
Our Price

$176.90 (pair)

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  • Item 30020
  • MPN# 23942B

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Features & Details

  • Better Traction, Faster Launches, Less Wheel Hop
  • Improve Cornering Performance
  • Exclusive Bind-Free Design
  • Hassle-Free Installation Requires No Modifications
  • Sold as a Pair
  • Fits 2005-2014 V6, GT, Bullitt and GT500 Mustangs
See our 2011 GT Project Car Now

Control Your Control Arm Flex. Improve your Mustang's straight line acceleration and cornering grip at the same time with these Extreme Joint Mustang Lower Control Arms from J&M. With your stock lower control arms, the exceptionally soft OEM rubber bushings insure your control arms don't bind, preventing undesirable handling characteristics like snap oversteer. However, if you try to accelerate or stop quickly in your 2005 - 2012 V6, GT or GT500 Mustang and you're likely to experience wheel hop or rear end instability. Control your control arm flex with J&M's Extreme Joint Mustang Lower Control arms and go faster - everywhere.

Better Handling. With J&M's exclusive design, you get the benefits of a rigid bushing, resulting in better straight-line grip, but the performance of a spherical bearing under cornering, so you get the best of both worlds. The exclusive design of these lower control arms features a steel inner ball surrounded by polyurethane outer cups. The result is great traction during straight-line acceleration, and bind-free performance during spirited cornering for predictable grip.

Quality. Though harder to work with, J&M selected round tubing for its superior strength and resilience to bending and torsion when compared with rectangular or square tubing, while also being lighter. With an offset design to guarantee bind free geometry, these lower control arms are the perfect suspension upgrade to your 05-14 V6, 05-14 GT or 07-12 GT500 Mustang.

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

What's in the Box
Hardware included:
  • (4) Polyurethane bushings
  • (2) Short zinc-plated steel sleeves
  • Polyurethane grease
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

No more wheel hop!

(NOTE): These are just as good as the expensive ones-very solid and Energy Suspension bushings. Install was quick (Get new bolts & nuts from Ford). Down to the dirty...When people say wheel hop, they ...

Read More
Helpful (16)

One drive will make you a believer!

Here in metro Detroit there are lots of terrible roads that would make the rear end of my 2005 GT hop and shudder like a clumsy piece of junk when I tried to drive fast over them. Well, my first drive ...

Read More
Helpful (10)

Overall Rating 4.9 out of 5 stars
Read All 67 Reviews

Customer Photos (13) Submit Your Photo

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4 Questions / 12 Answers

Ask a Question

Would this effect the traction control in adverse conditions? I'm sure this is a stupid question but my 2012 5.0 with 3.73 gears has entirely to much wheel spin but living in Alaska when I push the magic button during winter snow (traction control) the car is simply amazing. Was just wondering if this product would hurt that?


  • No. This product is designed to keep your axle planted to prevent wheel hop. The axle ultimately is more stable, slightly improving traction. Should have no negative effects on your car.


Show 2 more answers Helpful (1)

Relocation after lowering? Once I have these on my car when I decide to add lowering springs in the future will I need to use a relocation bracket for these?


  • Lower control arm relocation brackets are not required when lowering your Mustang.


Helpful (0)

lowering If I decide to lower my car would these effect my traction in a negative way since they are not adjustable?


  • It depends on how much you lower your car. You may need relocation brackets to correct the angle, otherwise the geometry is affected in such a way that lower control arms can actually "lift" the axle. This is not specific to J M Extreme Rear Lower Control - It applies to ALL rear lower control arms.


Show 2 more answers Helpful (0)

Alignment? I didn't think so, but now I'm not sure. Do you need an alignment after installing these?


  • Nope. Its a simple bolt on


Show 4 more answers Helpful (0)

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Customer Reviews (67) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Handling Improvement 4.636364 4.6
  • Fit 4.836364 4.8
  • Bang For Your Buck 4.648148 4.6

  • 5/5

    June 14, 2011

    No more wheel hop!

    (NOTE): These are just as good as the expensive ones-very solid and Energy Suspension bushings. Install was quick (Get new bolts & nuts from Ford). Down to the dirty...When people say wheel hop, they also mean when you take a corner and the rear bounces out over a bump. You know the drill; lifting on the throttle around a bumpy corner so the end doesn't bounce around and slide out. These will cure most of that issue if not all of it. First test drive and I had none of that issue anymore. The car became very predictable and I no longer braced over bumps. Rear end is more controlled and because of that, my grip increased.


    Year: 2007 Submodel: GT

    Helpful (16)

  • 5/5

    Installation Time: Afternoon

    May 28, 2012

    One drive will make you a believer!

    Here in metro Detroit there are lots of terrible roads that would make the rear end of my 2005 GT hop and shudder like a clumsy piece of junk when I tried to drive fast over them. Well, my first drive after installing these control arms was a revelation. I immediately headed for a really bad section of road to see how they would do, and was amazed. The rear end stayed planted over all but the biggest bumps and broken sections, and even then it only hopped a little bit. Hard launches were a breeze, with no more hopping or shuddering just wheelspin! Because the rear suspension is so much tighter and more precise it makes the whole car drive better. Handling feels much sharper with the vague feeling from the axle gone - I really felt the difference when taking on-ramps! I honestly can't think of any negatives to these control arms. They ride nicely and are very quiet, and can be installed in less than 2 hours if you have someone to help you. Bottom line - if you still have stock lower control arms on your car, spend the $175 and get these. Beg, borrow or steal if you have to, you will not be disappointed!


    Year: 2005 Submodel: GT Detroit MI

    Helpful (10)

  • 5/5

    June 07, 2010

    EXCELLENT Prouct!

    This is a must if you lowered your car at all. Before installing I noticed more noise and a mild clunk in th back, but after installing these everything is much quieter and smoother.

    James Y

    Helpful (7)

  • 5/5

    January 09, 2010

    Throw away your stock Lower Controle arms

    These control arms function better than I ever thought possible. The car is smother , corners better and accellerates better. The squeeks went away now that the suspension can work without binding or flexing the stock control arms. The instructions had pictures and not all the references in the text appeared to align with the pictures but if you do what the picture shows you will be able to install these in about an hour.

    Michael Hogan

    Helpful (7)

  • 5/5

    Installation Time: Less than 1 Hour

    February 13, 2012


    I really loved putting these control arms on my Stang, i did go to Ford and buy new bolts and nuts I really suggest doing so the rear bolts looked fine however the front bolts has some marks on the threads. The new arms fit perfectly and once I got driving I tried a few launches and it was amazing how much of a difference there was while i still have alot of wheel spin it stayed planted and gripped up much sooner. Cornering is much tighter and feels much more confident. I am very happy and really recommend these to anyone looking to get a great lower control arm with a lube point. Oh, that reminds me the energy suspension bushings that come with them are fantastic.


    Year: 2011 Submodel: GT El Paso, TX

    Helpful (6)

  • 5/5

    Installation Time: Afternoon

    January 28, 2012

    J&M lower control arms

    If you want to improve the traction and handling without putting new springs and shocks on your car then i recommend the J&M extreme control arms. Why? because the amount of sway that the stock arms give is terrifying in the corners, and the amount of wheel hop is annoying while accelerating but with the J&M you have no sway, so much more confidence in the corners and no more wheel hop. Installation is easy part from the parking brake cable goes through the old control arms so disassemble takes some time. For guys who like to show their stang the corners at much higher speeds without spinning out you have to get the J&M Extreme!!!


    Year: 2005 Submodel: GT abbotsford B.C

    Helpful (6)

  • 5/5

    April 14, 2010

    Extrem LCA

    Great product for recently lowered 08 GT with H&R springs.Product definitely helped with ride quality after drop.You NEED these especially if you drop the car.A significant increase in handling and stability is noticed immediately.Install was about 32 min can't beat that.Polyurethane bushings are the way to go.I am very pleased with the end result.You wont regret it.


    Year: 2008 Submodel: GT

    Helpful (6)

  • 5/5

    Installation Time: Less than 1 Hour

    April 24, 2014

    Fantastic Difference

    My GT500 has about 650 hp at the crank and I can hook it now in most of 1st, 2nd, and all of 3rd gear with the factory Goodyear tires. Unbelievable how much traction these give. Car also feels better; doesnt fishtail, shimmy, or skip around at all anymore. Install was a piece of cake. Don't waste your time with new tires until you install these. I can take off from a light and really get on it and not worry about spinning the tires, and when you corner the back end stays tight and hugs the curve. The effects of these arms on the car are absolutely fantastic.


    Year: 2007 Submodel: GT500 VA

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    January 28, 2012

    Great quality, great price, a must have for your S197!

    I have yet to upgrade any suspension component on my '11 GT and I bought these with one goal - eliminate wheel hop. The only reason I gave this a 4/5 for handling improvement is because wheel hop was significantly reduced, but not 100% eliminated. Granted, the Pirelli summer performance tires that came with the Brembo package have little tread and I was driving on moist roads in 30 degree weather. I experienced some wheel hop with those conditions when launching really hard from first. However, in those same conditions, I have yet to cause wheel hop when downshifting. Even for the "sweet spot" - shifting into 2nd and 40mph. It just bites the road. Cornering feels more planted and is much more confidence inspiring. It feels more predictable and more solid. I would recommend having a friend to help. Unless you're a beast and can position the rear axle with one hand, while guiding the bolt into the control arm lol. Other than that, I didn't run into any issues during the installation. Overall, a superb product!


    Year: 2011 Submodel: GT West Bloomfield, MI

    Helpful (5)

  • 5/5

    June 14, 2011

    The Perfect LCAs

    I had some hope that these LCAs would help with the traction issues, and it helped big time. My launches before were a "squat and go", but after the installation, there is little "squat" and a lot of "go". I have to mention that the passenger-side LCA gave me and a friend of mine the hardest time - it didn't line up with the bracket on the chassis. I needed 3 people to push the entire rear assembly forward just to have someone put the bolt in. Other than that, I'm very happy with these LCAs. There's no comparing these LCAs to the stock ones.

    Dustin M

    Year: 2009 Submodel: GT

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    May 10, 2012

    Jackstand Install

    The hardest thing with the entire install was getting the bolts torqued to 129 ft/lbs with the car at "ride height with a loaded suspension"(thanks to the guys at Tire Connection for use of their drive on lift). I found it easier to install the rear bolt first and then lift the differential with a jack and push the arm into the the front mount. I did the install using jack stands in my carport. The new arms are quiet and they give you a feeling of confidence while driving, unlike the soft feeling of the stock LCAs.


    Year: 2010 Submodel: GT500 El Paso, TX

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    March 18, 2014

    A+++ great product

    These lca's are perfect the money. Eliminated wheel hop and keeps the end grounded for better traction! I am 100% satisfied with product and recommend for anyone looking to improve launches and hard cornering.


    Year: 2013 Submodel: GT

    Helpful (3)

  • 5/5

    Installation Time: Less than 1 Hour

    February 19, 2013


    These went on easy...hardest thing is torque to 130ftlbs on the ground. Night and day difference around corners.


    Year: 2012 Submodel: GT Houston , Tx

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    May 09, 2012

    What a Difference

    Very pleased with the results. I thought that lowering my car made a big difference in the corners until I had these babies installed. Huge difference going in and out of the corners and almost eliminated wheel hop. If I had known how well they work, I would have installed them when I lowered my car… maybe even before.


    Year: 2011 Submodel: GT Colorado Springs

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    May 21, 2014

    Wheel Hop Gone!

    The title says it all. Installation was simple and they just flat work. This is a no brainer choice. Don't waste your time thinking about it...just do it.


    Year: 2012 Submodel: V6

    Helpful (2)

  • 3/5

    Installation Time: Less than 1 Hour

    September 29, 2013

    Solved one problem--created another

    The product did indeed eliminate "rear wheel hop" on my 2013 GT Mustang---but due to the "hardness' of the new control arm bushings---I now have a lot of "clunking" sounds coming from the drive line whenever I engage or dis-engage clutch or slow down in one of the higher gears. The J&M tech told me "this happens and it's due to the "back lash" or "end play" of the transmission. Had I known this advance---I would not have installed the control arms. I would strongly suggest researching other products if you are planning on replacing your lower control arms.


    Year: 2013 Submodel: GT Mt. Airy, MD

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    July 02, 2013

    Excellent product and easy install

    These J&M Ext LCAs do a great job of firming up the rear end when taking corners quick. I even notice a different when driving around town...much more solid in the back. Couple of pointers: 1) Arms shipped with stickers upside down...Make sure you triple check instructions and YouTube to make sure you get the offset correct. 2) The chassis is likely to shift during install. Use a strap with a racket to connect to the front bolt and rear chassis to bring the back end forward about 1/2" so the bolt will fit. 3) If you use new bolts (Ford recommends this, but is it not necessary), buy them online. I was totally fleeced by the dealership! 4) Buy some extra grease. I'm using Royal Purple, but a silicon based Marine Grease might be a better choice (but is VERY messy) 5) Torquing the bolts properly was the most difficult part. Getting enough leverage on the wrench is tough if you are using jack stands. Overall, great purchase. I appreciate the help from AM before the install and after the install.


    Year: 2011 Submodel: GT500 Phoenix, AZ

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    February 15, 2013

    Good Fit and Finish

    For the class we're racing we needed something that was solid and able to handle hi RPM launches. This was the perfect choice, great fit and helps reduce the wheel hop. The difference over stock is tremendous.


    Year: 2013 Submodel: GT Malvern, PA

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    June 13, 2012

    2011 Mustang J&M Lower Control Arms

    These are improved compared to similar LCA a year or so ago. The old ones required assembling the roto-joint into the control arm, while the new model, it is pre-assembled. Thank you J&M. While it wasn't difficult to assemble the prior version, it was tricky and frustrating. The extreme control arms are quiet and smooth. I recommend them. 1 Hr + install time; not an afternoon


    Year: 2011 Submodel: Other Reading, PA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    July 20, 2017

    Great part, highly recommend.

    I replaced the rear lower control arms and the 55D rear springs with the Steeda Sports and the JandM at the same time. Made a very noticeable difference. Before, there was a rubbery feeling to the rear end. Now, it seems the front end could be stiffened. A slight increase in NVH but not enough to worry about. During assembly to help with alignment of the control arms, jack up the front part of the pumpkin to rotate the rear end into proper position.


    Year: 2013 Submodel: GT

    Helpful (1)

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