Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 2018 RTR Spec 3 Mustang Enter Now!

Steeda Rear Chassis X-Brace (05-14 Coupe)

Market Price $313.99 You Save 11% ($34.04)
Our Price


FREE Shipping
  • Item 101162
  • MPN# 555-5093

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
In Stock Ships same business day.
Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Ideal for Race Applications
    • Strengthens Chassis to Reduce Flex
    • Retains Rear Seats
    • Black Powedercoat Finish
    • Simple Bolt-In Installation
    • Fits All 2005-2014 Mustang Coupes
    Reduce Body Flex. A Steeda Rear Chassis X-Brace is a great and easy way to increase the chassis rigidity of your S197 Mustang to eliminate power robbing body flex and to improve handling performance.

    Retains Rear Seats. Unlike other rear x-braces on the market today the Steeda Chassis X-Brace does not require removal of the rear seats for installation allowing you to still seat four passengers.

    Quality Construction. Manufactured from 4130 chromoly steel for superior strength, this Steeda X-brace is completed in a black powder coated finish for impressive looks.

    Bolt-in Design. The Steeda Rear Chassis X-Brace bolts into location using existing factory mounting points with no cutting or modifications required for a straight forward installation. Can be welded into place if desired for additional strength.

    Application. This Steeda Rear Chassis X-Brace is designed to fit 2005 to 2014 Mustang Coupes, including the V6, GT, Bullitt, BOSS and Shelby GT500 models. Does not fit convertibles or vehicles equipped with Shaker/Mach 1000 stereo systems.

    Note: Coupon codes cannot be applied to this product.

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

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

    Does not fit convertibles or vehicles with Shaker/Mach 1000 stereo systems.

    People Who Bought This Item Also Bought

    Customer Photos (14) Submit Your Photo

    View All 14 Photos

    You Might Also Like

    5 Questions / 5 Answers

    Ask a Question

    will rear shock tower brace work with this? could this be used in addition to the steeda rear shock tower brace?


    • Not without modification of the products - bad move to willingly void product liability....Besides, There isn't a need for the addition or use of the shock tower brace when using the Chassis X-Brace. However they both work well - one better than the other. The Steeda Chassis X-Brace attaches to the shocks and shares impact with the rear pan; and the x-y moments of deflection at the top of shock, to include impact are absorbed by the cross chassis bulkhead panel (top attachment) quite well. In the end you have a choice - pick one.... stiff , stiffer with design tolerance of shock bushing movement intact. X-Brace is definitely more ridged.


    Helpful (6)

    It says it won't fit vehicles that have the Shaker/Mach 1000 stereo systems...Is that for all Shaker systems ?


    • The Steeda Rear Chassis X-Brace will not fit the Shaker 1000 stereo system because of the subwoofers. It will fit the Shaker 500 system.


    Helpful (1)

    I have Koni adjustable shocks. Will this brace interfere with the adjusting knob?


    • This brace should run no interference with the adjustable knobs on the shocks.


    Helpful (1)

    Which would be give a stiffer suspension this X-Brace, or a rear strut tower brace in combination with a Seat removal* X-Brace


    • The Steeda Rear Chassis X-Brace - Coupe (05-14 All) generally gives a stiffer suspension because of its construction. The X in the middle will absorb impact. The X-Brace is definitely more rigid than the Steeda Rear Shock Tower Brace (05-14 Coupes), item # 16155, (


    Helpful (0)

    will amps mounted to back of rear seats interfere with this? I have an AMP mounted on the back of each rear seat, am i correct to assume there will be an issue with installing this product?


    • Unless you're tracking this car all the time this upgrade is not for you. You actually want some flex back there. Yes your amps would interfere with this. If you're mainly on the street I would recommend the rear shock tower brace if you feel you need bracing back there.


    Helpful (0)

    More Products You Might Like

    Customer Reviews (20) Write a Review

    Overall Rating 4.8

    out of 5 stars

    • 5/5

      May 19, 2016


      I combined the Steeda rear chassi X brace along with the SR performance rear shock tower brace to tighten up the rear ended. I have the front shock tower brace and the Eibach pro system plus suspension kit. I added a double adjustable panhard bar, and double adjustable rear upperand lower control arms. My mustang goes where I put it. I'm confident going into now. Before I tightened up the rear end it was really lose and a little sketchy taking tight corners. I highly recommend these mods!


      Year: 2012 Submodel: V6

      Helpful (5)

    • 5/5

      October 17, 2016

      Steeda x brace

      The x brace is awesome definitely worth it. Lap times improved at Laguna seca!


      Year: 2007 Submodel: GT

      Helpful (4)

    • 5/5

      August 08, 2016

      Easy install

      This was an easy install and you are able to keep the rear seat on place. I have the Shelby Kicker subwoofer and the brace fits fine.


      Year: 2007 Submodel: GT

      Helpful (3)

    • 5/5

      January 27, 2015

      As always with Steeda

      This is a well made part and performs as expected when it comes to Steeda parts. However, you are going to need an air impact to tighten up the top shock mounts. Even with an electric impact, I was not able to get both snug and tight...just keeps spinning the shock stud around and around. Anyhow, with an air impact, this is a one hour job..tops!


      Year: 2013 Submodel: GT Conroe, TX

      Helpful (3)

    • 5/5

      December 19, 2014

      Looking for Perfection

      The Steeda Rear ChassisX-Brace balances and distributes the stresses induced by each of the shocks through-out the rear of the chassis. Once you view the installation the lightbulb will flash for you. Engineered perfection! And, if you're serious about occasional road course adventures, this bolt-on X-Brace will surely impress you. Best of all you'll maintain the option of keeping your rear seats functional and intact. I believe you can expect longer than normal longevity from all components attached to this X-Brace. Feel and hear the difference.


      Year: 2005 Submodel: GT Northern AZ

      Helpful (3)

    • 1/5

      June 07, 2017

      did not fit my set up

      if you have the shacker 1000 stereo with the subwoofer it will not work for you, it would have been nice to know that, also you have to drill into your car to mount. But other then those welds and metal heavy duty and ready for bashing.


      Year: 2005 Submodel: GT

      Helpful (2)

    • 5/5

      January 13, 2017


      Awesome fit, I combined this with a steeda front tower brace, feels a lot tighter.


      Year: 2007 Submodel: GT

      Helpful (2)

    • 5/5

      April 01, 2017

      Steeda Rear Chassis X-Brace

      This was a HUGE improvement! Car is just much tighter now. No floating down the hi way! Well worth it and it looks badass!


      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      January 11, 2017

      Simple install, big improvement in stiffness

      I installed this on my 2012 Boss 302. This was a simple install. I did not need to jack up the car. Be sure to use 1/2inch drill bit, otherwise the bolts wont go through the holes. Tightening the shock bolt/bushing was a bit tricky. I ended up using 18mm wrench to hold the shock and used the 9mm wrench at the top to spin in reverse to tighten the shock. The X-brace had an immediately obvious impact on the stiffness of the car and improved handling. I am very happy with this product. It is extremely well-engineered.


      Year: 2012 Submodel: Boss

      Helpful (1)

    • 5/5

      January 07, 2017

      wish i purchased sooner

      one of the best upgrades for the dollar. easy install and a big difference. might hear some creaking if you have taken the seats out in the back. looks great as well!


      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      December 04, 2016

      good product

      I have a 06 gt did not fit with stock hoes like it said had to drill and make my own pretty easy to do overall fit perfect though


      Year: 2006 Submodel: GT

      Helpful (1)

    • 5/5

      October 24, 2014

      X marks the rigid spot

      I was pleasantly surprised when I received this brace. I did not expect it to be so heavy duty and still very light in weight.With this and the front strut tower brace, my stang handles like a whole different machine, like its on rails. Thanks AM, you did it again, quality products at a fair price!!


      Year: 2014 Submodel: V6 anchorage ak.

      Helpful (1)

    • 5/5

      October 21, 2014

      Steeda X-Brace

      Awesome x-brace. Retain back seat, retain most usuable trunk space, increase handling, super look, and relatively easy install. (Tight work space in trunk, but no jack needed. Feel right into place.) Considering all this, why wouldn't you...


      Year: 2008 Submodel: GT North Carolina

      Helpful (1)

    • 5/5

      June 03, 2014

      quiets some chassis noise.

      It arrived well packaged with detailed instructions. Took me about 1.5 hours to install. I would recommend using a 1/2 inch drill bit instead of the recommended 7/16. Once I took it out for a test drive I immediately noticed I difference in chassis stiffness. Be prepared to lose some trunk space, however.


      Year: 2010 Submodel: GT Toronto, ON, Canada

      Helpful (1)

    • 5/5

      May 27, 2014

      You need this

      Great quality, looks, performance and price, and with the Steeda name, you can't really go wrong here. Very easy to install and does the trick.


      Year: 2008 Submodel: Other Texas

      Helpful (1)

    • 5/5

      April 18, 2014

      Steeda x brace

      Amazing how easy it is to install and once installed the difference is instant. Take corners with confidence. Looks great not outa place and retains the trunk space


      Year: 2013 Submodel: GT Mukwonago WI

      Helpful (1)

    • 5/5

      March 24, 2014

      Steeda Rear Chassis X-Brace

      This is a very quality manufactured part. Install is a breeze, I didn't have to use a jack to install it like the directions say. I can definitely tell there's a difference in the way the car handled prior to the install, to after. On to the next add-on :)


      Year: 2007 Submodel: GT Grayslake, IL, USA

      Helpful (1)

    • 5/5

      December 29, 2017

      Chassis x-brace

      Well to be honest if you have the right tools you can finish this job really quick 30 minutes tops I combined the brace the the sr rear shock brace and it’s a nice combo and it does improve handling significantly.


      Year: 2014 Submodel: GT

      Helpful (0)

    • 5/5

      August 21, 2017

      Works awesomely!!

      It stiffens the cars where it really needs. The car is actually quieter too. The install was very easy. I used a stepped drill bit and was done in about 35 minutes. Upon driving, the first thing I noticed was how solid the car felt, even in mild cornering. In more agressive cornering, the added bracing let me rear suspension go to work and do its job. I was utterly amazed at the improvement. One week later, Im still amazed!!


      Year: 2014 Submodel: GT

      Helpful (0)

    • 4/5

      May 25, 2017

      Nice piece easy install

      Nice piece, easy install, you will need four additional hardened washers for the install, but thats minor.


      Year: 2013 Submodel: GT500

      Helpful (0)

    Related Mustang Categories