Steeda Mustang Billet Rear Lower Control Arms - Poly Ends (05-14)

Steeda Mustang Billet Rear Lower Control Arms - Poly Ends (05-14)
555 4405


*Save over 6 lbs. compared to the OE control arms by switching to Steeda!*

When only the best will do, say it with billet! These billet rear lower trailing arms replace the stamped steel OE parts, and depending on your desired performance goals are available with urethane bushings or a spherical bearing/urethane bushing combination for high horsepower applications.

These lightweight yet super strong arms reduce un-sprung weight and eliminate wheel hop. Steeda was first to market with these control arms and had them on the shelves even before the 2005+ Mustang was released thanks to our exclusive technology transfer program with Ford Motor Company. Steeda was the first to incorporate the proper design rear offset for the rear lower trailing arms.

Don't be fooled by other companies claiming to be first with this offset, yet they have only had their arms on the market a few months! Steeda's exclusive polyurethane bushing package also ensures smooth, quiet operation combined with performance. No increase in NVH (noise, vibration, harshness) with our poly bushings like competitors arms. Part number 555-4406 with a spherical bearing on one end and our exclusive poly bushings on the other is recommended for high horsepower applications and will only have a slight increase in NVH over the standard polyurethane bushing arms.

Don't settle for anything less than Steeda original innovation.

Note: 555-4406 recommended for 500+ horsepower applications. Slight increase in NVH will result from this part.

U.S. Patent Pending

Product Benefits

  • Eliminates wheel hop, improves traction.
  • Super strong billet construction.
  • Lighter than stock and competitors arms - reduced unsprung weight.
  • Used on the fastest production built Mustangs

Learn the differences in Steeda brand control arms, read our blog post for more info:

MPN: 555-4405

Fitment & Features

Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information
Tools Required: Basic Tools
Time of Install: About 2 Hours
Level of Difficulty: Tech Recommended

Video URL:

Customer Reviews

Best arms on the market
I looked at just about every other set of lower control arms on the market, and I couldn't bring myself to purchase any of them. These control arms are lightweight, strong, beautifully crafted, and have a superior bushing design. I honestly didn't expect half of the improvement I got out of these arms; they are worth every penny. I literally didn't realize how bad my wheel hop was until I swapped these arms in, much more stable in a straight line it seems as well. I took my girlfriend out for a spin after installing these, when I launched it she freaked out and said I left the hood unlatched, she had never seen the car lift that hard in the front.
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Reviewed by:  from South Carolina. on 4/7/2013
Very nice upgrade
This is the second set of Billit Lower Control Arms that I have purchased and installed from Steeda. The latest se went on my 2010 Shelby GT500. This is a very nice upgrade for any Mustang. These along with the Steeda adjustable UCA and wheel hop is a thing of the past. The quality of this product is second to none.
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Reviewed by:  from Florida. on 5/26/2012
Great product!!!
I installed these aluminum LCA's on my 2011 V6 in about an hour....Great product!!! They definitely look too good to be under the car!!! What a shame.... These compliment my Steeda sport springs for a much stiffer ride and better handling. No more wheel hop. UCA in next.
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Reviewed by:  from Florida. on 8/3/2012
Had these installed on my BOSS at their Pompano Beach facility along with Steeda relocation brackets.Right away I felt the difference! The rear of car feels more solid and planted! Wheel hop pretty much gone and off the line traction much better!
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Reviewed by:  from Florida. on 11/13/2015
I purchased this product as part of a full suspension kit and had it professionally installed. The performance shop stated these are the best products for street and track use. I am extremely happy with the quality of the parts as well as the performance.
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Reviewed by:  from Sanford, FL. on 3/14/2018
Makes the most difference
Honestly, these Billet LCAs are my favorite mod on my car. The just look so mean installed on the car. Rear end is solid. My traction increased a ton and the car just launches.
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Reviewed by:  from Florida. on 1/12/2013
I love this mod!
I love this mod! My car hooks up better and honestly, they just plain look cool. The stock part looked like junk. I was very worried about NVH. My car had no appreciable increase.
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Reviewed by:  from Oregon. on 2/20/2013
quality is second to none
these arms are almost too pretty to use, they work great with the adjustable upper, adjustable pan hard bar and brace. my bullitt handles much better and the quality is second to none.
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Reviewed by:  from Alabama. on 7/30/2012
Great Upgrade
I track my car at Miller Motorsports Park and can feel the difference going through the "Attitudes" - a rapid series of turns that simultaneously drop in altitude. I had gotten used to this track section in stock form - but with these new Billet Aluminum LCA's - Wow! Now instead of a bit of apprehension - it's "Bring them on!" It's a bonus that they look way cool...
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Reviewed by:  from Utah. on 9/21/2013
These arms deliver
I never had a wheel hop problem except in the wet. It was quite noticeable when I was stopped uphill in the rain and then had to accelerate quickly to get out of the way of a car that wasn't going to stop. Not a fun moment, first wondering 'what the heck is that' and then having to back off to get some grip when I shouldn't need to do that. In the dry I didn't have any problems, but the rear end did feel a little vague sometimes. No longer a problem with these LCAs. Where I live doesn't see much rain, but lucky for me there was some rain two days after I installed the LCAs. Big difference compared to stock. The rear stays planted and acts the way I expect it to. Predictable handling is important, of course, and these arms deliver. Very well made and beautiful parts too. No squeaking or increase in NVH from stock. Great design with the metal washers and bushing parts compared with arms I've installed on other cars.
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Reviewed by:  from Georgia. on 12/1/2013
Plant the Power!
Man, these lower control arms help to really plant the power to the ground! Was having traction issues and these corrected it right away!
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Reviewed by:  from Oklahoma. on 1/5/2014
Well worth the money
Fantastic upgrade from stock arms , simple install and NO NOISES, but I greased everything like they said. The car feels tighter underneath and I have more control over it, well worth the money.
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Reviewed by:  from Montana. on 10/6/2014
Steeda LCA's Installed
Finally got my lower control arms from Steeda installed. I have got a good chance to test them out to grade them on performance. However, one thing did surprise me... How great they look on the car! It's just a hint of "hey, that's not stock" as you catch just a glimpse of the shine of the LCA from between the rubber and the body. Steeda did a great job at making these beefy and it took just under a hour for a friend of mine to get them on the Mustang at the shop he works at.
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Reviewed by:  from Florida. on 2/24/2015
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