Question on Cages
Unibody cars with stock floor and firewall (wheeltubs
permitted) may attach roll bar with 6-inch x 6-inch x .125-inch
steel plates on top and bottom of floor bolted together with at
least four 3/8-inch bolts and nuts, or weld main hoop to rocker sill
area with .125-inch reinforcing plates, with plates welded
completely. Also, the roll bar may be welded to frame connectors
that are fully welded in place and are 1 5/8 inches x .118-inch
MS or .083-inch CM round and/or 2 inch x 2 inch x .058 MS or
CM rectangular.