idk, i just thought air was easier…i mostly neet to strengthen around my rear bumper…its starting to rot…well its above the axle…so its a PITA …only thing it affects is the rear bumper wobbles up and down…lol, but i was also thinkin about pullin my motor and exhaust and junkin the car and getting one that doesnt have said frame rot and the rust holes along the bottoms of the doors…