Steeda Mustang Billet Rear Lower Control Arms - Spherical/Poly Ends (2005-2014)

3 Review(s)
$25.00 (6%)
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.

Part Number: 555 4406
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*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.

PATENT NO.: US D543,492

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

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

CA Residents: Cancer and Reproductive Harm WARNING

Hi everybody Brian from here today to talk to you about our S197 Billet Lower Rear Control Arms. Now one of the things that you S197 owners experience is wheel hop and it's because of the soft bushings the factory used. Not to mention the fact that those bushings are starting to get old, especially if you have an earlier S197. So we offer three different control arms to suit you and the different needs that you may have. Each of the arms is built of CNC Billet Aluminum. This takes off six pounds from the Lower Control Arms that takes away unsprung weight improves performance so each one of these is going to be an upgrade compared to the factory control arms. Now a lot of you are going through and adding performance upgrades to your car, but you're still driving on the street or maybe you'll take it to the drag strip once in a while. We have the perfect balance for you. This particular arm the street arm utilizes polyurethane bushings at both ends. Polyurethane bushings are higher durometer, much higher than the factory rubber bushings that were near original control arms. These will help alleviate wheel hop, but also won't transmit any noise vibration and harshness. For those of you taking it one step further we have the perfect arm for you designed for a track and for street. We utilize a spherical bearing at the back end to reduce any deflection. It's teflon coated, pre-loaded and made of stainless steel. We pair that up with a polyurethane bushing. Polyurethane bushings still going to be much stiffer than the factory rubber bushings but it's not going to add any noise vibration or harshness or at least very little. For those of you looking for the ultimate and performance but still street drivability we have the perfect arm for you. Utilizes the same spherical bearing at the other end however we've equipped this arm with a Delrin Bushing. This Delrin Bushing is a much higher durometer this means that there will be no deflection or very little deflection and instantaneous response. To sum it up we have three great controls arms for you. We have a street performance upgrade. We have our Street and Track Performance upgrade and this control arm actually is very popular with our GT500 owners and those of you that have added Superchargers or other power adders to your car, and lastly we have our Track and Street upgrade control arm. This is still streetable however it's really designed to be utilized and measured at the race track. Our Billet Control Arms are Proudly Manufactured in the USA at our Georgia facility, because Speed Matters!! If you have any questions or comments about these please post below. If you'd like to learn more about these Control Arms amongst many of our other Suspension Products, Please visit, don't forget to follow us on social media and Have a Great Day!!
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Fitment & Features


Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information:

Level of Difficulty: Tech Recommended
Install Time: About 2 Hours
Tools Required: Basic Shop Tools
Print Instructions: Installation Instructions

Vehicle Fitment:

Fits Model Year: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

Customer Reviews

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Average Customer Ratings


Very strong and does not break!
i have been Tarmac Road racing on this part for 6 years over 10,000 miles of Extreme use: very strong and does not break! perfect for all applications. only thing is you must lubricate the nolethane end regularly.
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Things are awesome! Much lighter and stronger than stock, not too mention they look great!
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Beautiful performance
These weigh half as much as the factory LCA's. Acceleration feel's more controled also.
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