Just a heads up, its a much safer option to have each side shock on separate lines, I've heard of stories of these as rally cars hitting a pothole on one side whilst running air shocks and a single feed line, and it has caused the other shock to inflate, and cause the cars to crash due to the rear enn being thrown all over the shop, I'm sure its one of those rare events, but worth mentioning. Also more common with towing and a pothole then greatly unsettles a car