Yes.
Legally you can't without getting approval from the NHTSA.
Yes you can but in the event of a serious accident your survival rate goes down.
yes just wont pass inspection
yes
Much better than without them.
You can put Air in Air Shocks Not Air Bags
Indefinitely.
I had '97 that I had to change the pump and bags at six years. Another '97 still has it's OEM pump and bags, my mother-in law drive it now.
Air bags designed for doing that, not auto air bags. Question was in auto repair.
You can drive a car without an air intake pipe but it may end up pulling hot air in from the engine compartment. This will reduce the engine's overall performance.
no