These tie rod adjusters work with the factory tie rod ends with no modifications. UMI Performance Tie Rod Adjusting Sleeves 2104. Product Line UMI Performance Tie Rod Adjusting Sleeves. This item uses a 11/16" thread while item #2102 uses 5/8" thread.
I have a set of these on my 1971 Camaro. They work great and a definite upgrade over the flimsy stock adjusters
Def worth buying and putting on your car