Taken from the CAV (South African) web site. Hope this helps.....
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"The CAV GT has a tig-welded, stainless-steel monocoque chassis designed for torsional stiffness. Its integrity is ensured through CNC punched and bent panels and laser cut parts.
The chassis is welded in jigs and its dimensional accuracy is superb. It features an integral roll over bar and side impact protection bars. Every CAV GT chassis is manufactured to accept a bolt-in roll cage for racing purposes."