Subframe connectors

If you want the full court press on sub-frame connectors, you should have the frame squared prior to installation. Install the connectors on the car in its fully loaded condition, running gear, stereo, driver, half tank of gas, spare and so on.

My personal experience is having the franes installed on a loaded car makes sense, but Ive never had any problems installing them on a car without checking the frame first. Its your choice. I can see where installing frame connectors on a tweaked chassis would ensure screwy handling, but if you don't suspect the frame, you can probably save yourself $200-$500 dollars to have it checked.