I thought you had to have the bottoms of the cage welded to 6x6 metal plates, that can only have one bend in them.
The seats i got for my car are the bride low max seats. I have good clearance sitting in them normal with my cage but, if i have a
helmet on then i can just take the pads out to get lower when in the seat when i need too.
Edit... although you have to be normal size person to fit in them, they sure hold onto you though