Upgrade the ball joints and correct roll center in your 1979-1993 Mustang front control arms with this 1/2" extended fully rebuildable QA1 Ultimate ball joint! QA1 Ultimate ball joints are a direct replacement for the factory ball joints with the correct press-in style to fit your Fox Body! Whether you are refreshing your suspension or replacing failed components, now is the time to switch to a 100% fully rebuildable wear-resistant design exclusively from QA1. An added benefit of on-car adjustability means there is no need to remove the ball joint from your Mustang to fine-tune the ball joint's operation.
Patented technology allows the fully greaseable ball joint to be enhanced by self-lubricating components to ensure smooth, low-friction operation. Breakaway torque may be set as low as 0 ft-lbs. thanks to unlimited preload adjustment and bind-free operation. The wear-resistant design utilizes precision tolerances, resulting in even load distribution for unsurpassed wear resistance. Long service life and exceptionally smooth operation are achieved by precision ground steel bearing races. When you install lowering springs, you change the height of your ride, which disturbs the steering geometry. Extending the stud by 1/2" inch helps raise the roll center back to its original point on lowered Mustangs, helping handling and body roll. Don't forget to pick up a QA1 Ultimate ball joint rebuild tool for quick adjustments and rebuilds.
The extended balljoints have a longer shaft, to raise the spindle relative to the balljoint pivot point. Spacers for the springs may be needed to maintain the same ride height as a stock balljoint but with a much-improved roll center height. With the roll center restored to the proper height, smaller front swaybars and softer springs can be used. The result is a suspension that works for you to accommodate the small and large imperfections that are in any road or track, allowing the tires to stay planted on the ground where they belong.