No it's not tube length that was my issue it was my lower mounts from one side to the other. say for the sake of arguement I had my housing finished today (I don't but lets say I do) My lower mount on the drivers side is fictionally speaking 2.5 inches from the housing end and my passenger side is 1 inch from the housing end.(exactly no but about 1 to 1.5 inches Don't have the housing in front of me right now to say exactly)But everything else in the car lines up perfectly the arms are parallel to each other and to the frame rails and the rear end is perfectly centered throughout the travel.