Detroit Speed Driveshaft Safety Loop KitThis exclusive Detroit Speed driveshaft safety loop tunnel brace is a direct bolt on to your 1978 1988 G Body. The 1 4" thick steel by 2" wide meets NHRA requirements. The driveshaft loop opening is 5" wide and 4 1 2" tall from the centerline of the opening to the top of the arc. The driveshaft loop tunnel brace comes with all new hardware, adds stiffness to the center tunnel of the car, and can help prevent vehicle damage and injury in the event of