Steeda Street Adjustable Upper Control Arms Street/ Competition Use Mustang 1979-2004



  • Heavy-Duty Steel Construction
  • Three-Piece Bushings
  • Minimum Deflection
  • Made in the USA
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Steeda Street Adjustable Upper Control Arms Street/Competition Use for 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 and 2004 Mustangs.

Extreme traction and solid launches can give you a serious advantage at the dragstrip, which is why successful racers adjust the driveshaft-to-differential pinion angle. Optimized for street and competition applications, Steeda's Upper Control Arms (555-4100) are double adjustable, allowing you to alter the arm length without removing them from your 1979-2004 Mustang. 

Features and Benefits:
- Superior Handling, More Stable Cornering
- Eliminates Side to Side "Sloppiness" in the Rear End
- Wide Adjustment Range

The Street Adjustable Upper Control Arms (555-4100) minimize suspension deflection and improve control. The competition upper control arms are made of heavy-duty steel with race-quality spherical rod-ends, which accounts for the lack of deflection. You can thank Steeda's exclusive three-piece bushings with a hard center section for excellent control, while softer outer bushings prevent binding. Steeda arms are also available with the bushings for the differential.

Please Note: Does not fit 1999-2004 Cobras.

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

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