05/28/2026
Factory torque boxes taking a beating?
If you're making serious power, launching hard, or tired of fighting worn-out factory torque boxes, it's time for an upgrade.
Our 1979-2004 Mustang Upper Torque Box Replacement Kit was engineered to eliminate weak factory mounting points while giving you the adjustability needed to dial in your suspension setup.
✔ Micro-adjustable in .125" increments
✔ Lightweight 4130 Chromoly construction
✔ Precision TIG welded
✔ ARB tabs pre-installed
✔ Grade 8 hardware included
✔ Works with conventional upper control arms
More adjustment than most 4-link setups. Built for racers who demand consistency, durability, and performance.
Designed, manufactured, and race-proven in Detroit, Michigan.
Already running our Upper Torque Box Kit?
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https://www.teamzmotorsports.net/searchresults.asp?search=torque