You need to isolate the bags after you inflate them or they will transfer air when cornering etc. I did this but used a full port ball valve mounted in my bed box to isolate them. All the fittings I bought at theairliftcompany. The pressure fittings at depot etc are slightly different size.yes, you are right you can do this but it is not recommended think about what is happening to the air when you go around a corner it will be forced from the wheel on the outside to the wheel on the inside of the corner causing more lean. If you don't believe me then call Firestone or airlift and ask them. you will need more than just a tee or the bags will have different pressure when going around corners or if the bed is loaded heavy on one side.