This Apex 2011-2016 Ford Super Duty Axle Side Track Bar Ball Joint is a direct and heavy duty replacement for the factory ball joint. Ford designed this joint to be part of the factory front axle housing rather than the track bar, so replacing it with a track bar service is key to preventing death wobble or wandering steering. 
This Apex joint features a larger than stock wear surface, better serviceability and an overall stronger design. 
This axle-side ball joint replaces the factory ball joint on the OE front track bar, solving the known poor performance issue with premature wear in the factory part.

What It Fits:

Ford F250 Super Duty (2005-2019) 4WD

Ford F350 Super Duty (2005-2019) 4WD
HOUSING:
SAE 1045 Solid Steel Forged Housing: This is unequivocally the best carbon alloy steel for this application.
CNC Machined Housing: Make our parts and bearings dimensionally perfect, eliminating any die wear issues.
BALL STUDS:
SAE 4140 hot forged Chromoly Ball Studs: For the strongest possible metallurgy.
Induction Heat Treated Ball Studs: Provides a very precise heat treatment to the exact depth and location we want it.
Polished Ball Studs: Are built like an anti-friction bearing with extremely precise tolerances.
Rolled Threads: Are made by pressing the shape of the threads into the ball stud instead of cutting. This strengthens the threads instead of weakening them and allows for easy movement of hardware. This ain't no Ikea furniture!
Step Threads : allows for very easy movement of hardware on install and superior holding when torqued (installer choice).