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Steeda Adjustable Street Rear Upper Control Arms (79-04 All, Excluding 99-04 Cobra)

AmericanMuscle no longer carries the Steeda Adjustable Street Rear Upper Control Arms (79-04 All, Excluding 99-04 Cobra). Please check out Ford Mustang Control Arms for an updated selection.
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Features & Details

  • Better Traction and Faster Launches
  • Reduce Rear End Instability and Wheel Hop
  • Heavy Duty Steel Construction
  • Exclusive 3-Piece Bushings
  • Double-Sided Adjustability
  • Sold as a Pair
  • Fits 79-04 Mustangs
Dial-in Traction. If you're tired of wheel hop or rear end "shimmy," Steeda's Adjustable Street Upper Control Arms are your solution. These adjustable upper control arms will allow you to adjust your driveshaft-to-differential pinion angle and optimize your suspension geometry for maximum traction and smoking fast launches. Adjustable on both ends, these control arms allow you to dial in your optimum settings once installed, allowing you ultimate flexibility in determining your settings.

Better Handling. With Steeda's exclusive, race-proven 3 piece bushing kit on the axle end, these upper control arms reduce axle wind up and wheel hop and allow proper articulation without deflection - resulting in improved handling, better cornering, and greater overall stability.

Race-Tested Performance. With a race version widely used on NHRA and IHRA winners, these street & strip arms feature a softer outer bushing to prevent binding and increase grip on uneven surfaces.

Note: Coupon codes cannot be applied to this product.

NOTE: These control arms do not fit the 1999 - 2004 Cobra.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

MPN# 555-4100

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (2) Control Arms
  • (2) Steel Sleeves
  • (2) Two-piece bushings
Installation Info
Tech Specs
Will it fit my Mustang?
  • Bullitt - 01
  • Cobra - 93, 94, 95, 96, 97, 98
  • Cobra R - 95
  • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • LX - 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • Other - 79, 80, 81, 82, 83, 84, 85, 86
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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

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Customer Reviews (17) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

  • Handling Improvement 4.909091 4.9
  • Fit 4.909091 4.9
  • Bang For Your Buck 4.818182 4.8

  • 5/5

    Installation Time: Afternoon

    March 15, 2018


    Getting them on will be a tight fit, I used a jack and put it at different spots under the differential to make it easier to line up to slide in, also my recommendation for anyone, change the hardware, take the time and swap your old bolts and nuts and go to the store and buy grade 8 or higher, but after the install my car feels like a completely different car, power hooooooks and now I can adjust pinion angle which is great


    Year: 2002 Submodel: V6

    Helpful (5)

  • 5/5

    Installation Time: Less than 1 Hour

    January 28, 2018

    Great buy

    Item fits on like a glove. No problem putting it on very easy installation. Great bang for the buck


    Year: 1989 Submodel: LX

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    May 02, 2017

    Good upgrade

    These on top of a tubular style lower control arm has definetely reduced my wheel hop and make launches a bit better. I would not expect to see a major improvement in suspension feel by just doing these though, I would do both upper and lower to get full benefits.


    Year: 2000 Submodel: GT

    Helpful (6)

  • 5/5

    Installation Time: Afternoon

    November 06, 2016

    Sweet install..

    Just the perfect mod to correct the off center of my rear axle.Move the axle approx. 3/4 inch from driver side to passenger side without chaining the pinion angle..


    Year: 1991 Submodel: GT

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    January 21, 2016

    DJ. From West Virginia. Retired

    Installed these on my cobra roadster. Set pinion angle and made it handle and launch like a dream. Very pleased wth this product.


    Year: 1993 Submodel: Cobra Charleston West Virginia

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    April 06, 2014

    Awesome quality product!!

    This product fit great and definitely helped stiffen up the back of my gt. Knowing nothing going into the job, the instructions were spot on and were all I needed. Old control arms were actually twisted out to an oval. Only difficulty is removing old bushings from axel. By the second one, I found out a hole saw bit worked quite well to drill it out. Amazing product. Quick delivery. Thanks American Muscle from yet another satisfied customer!


    Year: 1999 Submodel: GT Milwaukee, WI, USA

    Helpful (7)

  • 5/5

    Installation Time: Afternoon

    January 06, 2014

    Steeda Adjustable UCAs

    I immediately noticed a difference driving the car. Shifts are more solid and the rear end feels very planted during hard cornering. The bushings are far superior to the ten year old factory rubber bushing that were in the car and the adjustment is simple. Great product at a great price.


    Year: 2002 Submodel: GT Wilmington, NC

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    June 03, 2012

    Steeda UCA

    Good product, hardest part was drilling out old bushing. I used a 1 inch and a 11/2 inch wheel wire brush attached to drill once the center section of old bushing was drilled out. Picked up wire brushes at Sears Hardware.


    Year: 1998 Submodel: GT Phoenixville, PA.

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    December 07, 2011

    Easy As Pie

    I had the entire rear dropped and removed for some other winter maintenance so the install went even easier. Got everything bolted back in and it was easily adjustable. Couldn't be happier


    Year: 2002 Submodel: GT Willow Grove, PA

    Helpful (5)

  • 4/5

    Installation Time: Afternoon

    October 25, 2011

    Excellent product to stiffen that rear end location.

    An awesome improvement over the pathetic stock rubber mounts, these also allow for pinion angle adjustments. Steeda is a great company for mustang stuff, their products just outperform cheap immitators, spend the extra money itll be worth it in the long run, btw no squeaks either.


    Year: 1998 Submodel: Cobra CT

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    September 29, 2011


    I needed to replace my arms and these were a great option!! Really enhanced the handling of my '03 and can't wait to see what my track times are now.


    Year: 2003 Submodel: GT Wayne, PA

    Helpful (3)

  • 5/5

    April 09, 2011

    Quality you would expect from steeda

    Quality you expect from Steeda. Helped correct my pinion angle and gave me much more solid launches. Also the price isn't bad at all.

    Erik H.

    Year: 2002 Submodel: GT

    Helpful (4)

  • 5/5

    April 01, 2011

    Steeda adjustable upper control arms

    Installed with several other suspension upgrades. Wheel hop is gone.

    steve ashton

    Year: 2002 Submodel: GT

    Helpful (4)

  • 5/5

    March 31, 2011

    steeda double adjustable uppers

    very happy with product. fairly easy install. easy to set pinion angle. great feel with lower control arms. another nice product from steeda.

    jeremy bodell

    Year: 2000 Submodel: GT

    Helpful (4)

  • 5/5

    October 17, 2010

    Just what you would expect from Steeda

    This product made a huge difference over the worn out stock UCA's. Easy to put on and with the pinion angle dialed in I'm getting much more solid launches.


    Helpful (4)

  • 5/5

    October 15, 2010

    Steeda adjustable upper control arms

    Definite improvement over stock uca's. No more wheel hop.

    Steve Ashton

    Helpful (5)

  • 5/5

    July 27, 2010


    Removing old bushing is a royal pain but once its out install is easy. Great on my lowered GT. No wheel hop and smooth handling. Set the new control arm to match the length of the old. makes setting the new pinion angle a breeze

    Dickie Ayer

    Year: 2004 Submodel: GT

    Helpful (7)

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