When a frame is cut, usually in front of the rear wheels, and a section is welded in to raise the axle so large tires can be used at stock body heights, racers say their car has been z'ed [pronounced ZEED,not ZED], referring to the new appearance of the frame.
Z'ED
Meaning of Z'ED in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012