Upper Torque Box Reinforcement Kit Heavy-Duty Mustang 1979-2004

CJ's Part Number:


  • Bolt-In/Weld-In Installation
  • Keeps Rear Frame Rigid
  • Heavy Gauge Steel
  • Quality Construction
MSRP $69.05
You save 13%

Heavy-Duty Upper Torque Box Reinforcement Kit for all 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.

If you’re all about racing or you just like to have an all-out performance Mustang, you know that the rear torque boxes take a lot of abuse. If your upper torque boxes are cracked or damaged it might be time to add some upper torque box reinforcements to your 1979-2004 Mustang. The job of the torque box reinforcement is to make the surrounding area of the torque box more rigid.

Kit includes:
- Upper Reinforcement Plates (2)
- Torque Box Plates (2)
- 1-1/4" Bolts (4)
- Steel Spacers (4)
- 4" Bolts (4)
- Locking Nuts (8)

Please Note: This Upper Torque Box Reinforcement Kit is a Bolt-in installation but should be welded in place for a better result.

This upper torque box reinforcement kit features a heavy gauge steel construction. This provides strength to the upper rear torque boxes that are constructed from weak stamped steel. With the 1979-2004 Mustang being a Uni-body vehicle the load from quick launches is forced to the rear torque boxes. This reinforcement kit will help improve handling, but it can also increase the longevity of your Mustang.

- Fits 1979-2004 Mustangs
- Heavy Gauge Construction
- Bolt-in/Weld-in Installation
- Keeps Rear Frame Rigid

California Residents: Proposition 65 Warning

Installation Difficulty


Advanced skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

Only registered users can ask/answer questions. Please sign in or create an account.
Write Your Own Review
Only registered users can write reviews. Please sign in or create an account.