Eliminates bending, flexing, and cracking of spot-welded sheet metal panels in unibody cars. Ties the front and rear frames together, creating a solid platform for increased performed levels. Legal for all classes of Drag Racing. Weld-in frame connectors available in Raw Steel. Steel Tube Dimensions: 2" x 2" x .083" wall. Requires Stock Floor Pan Modification. Must be used with formed frame rails.