AirLift vs Firestone air bags

I had the Airlift drill kit on a 97 dodge and the FS no drill kit on this 03. Both have the 5k double bellow bags and they looked identical and both work well. A friend has the twin truck to my 03 and his Airlift is the no drill but his are single bellow. I would try to find the double bellows in whichever brand. I bought a Viair compressor and built my own tanks and in cab controls for the bags and shocks and I later added the e-brake to it. Craig

I personally don't think there is a dime's worth of difference between the two. I'd go with whatever is on sale.