INSTRUCTIONS

Paste this line in managedmaterials section:

rollcage		mesh_standard			rollcage.png			-

Go to flexbodies section and paste this line:

9,10,29,0.5,-4.75,0.07,-90,180,0,rollcage.mesh
forset 0-108,139-195,294-299

Note: This aftermarket is just for looks, it does not strengthen the body.