Adjustable transmission crossmember. Works with manual or automatic transmissions. Adjustable from 37-54 Chevy car chassis. Built from 1 1/2" DOM round tubing and slips into 1 3/4" DOM round tubing. Kit includes weld in nuts for the chassis to make removable if desired. Tube can be drilled and a bolt installed through bolt tubes once correct width is achieved or welded in place.