Meyle is well known for their quality and with this kit you will double the life in comparison to stock replacements.
The main goal is to reduce if not eliminate steering slop and increase turn in that has been lost by the degredation of tie rods over time.
HD for longer life, especially when running wider wheels and tires, which can put a lot more stress on the oem tie rods and other suspension components.
For more information:
http://www.1addicts.com/forums/showthread.php?t=729063