I can now offer these OEM bolt in crossmembers with a bridge already in them and shipped to your door. Trucks at 6" in back don't need them, but trucks at 7" and more do. The rear drive shaft flange hits the crossmember when the diff rotates upward under acceleration or when carrying something in the bed.
Standard cabs and extra cabs require this bridged rear gas tank crossmember. The hole for the gas tank strap has been re drilled 1" to the left, and the original hole cut out. All tabs and exhaust hangers are where they should be. There is a core charge. Model shown is for a 2004. These are bolted and welded into a jig when customized to prevent any unwanted movement. PM for details.