RE vs HE bags

What is the difference between the RE bags and the He bags?

pressure rating i believe

The RE's are rated at 200 PSI and the HE's are rated at 400PSI ... also, the HE's come with dual ports whereas the RE's are single port.

The XS's are dual port but rated to 600 PSI ... I do not know if the ports in the XS's are bigger than the HE's or not, but it would make sense.

I dont need anything more than the RE's on the front of my dually, but I might have to go to the HE's to get the double ports.

The XS are dual 1/2" port.

What is the differance between RE/HE 6,7,8? Does it apply to the bag diameter or the compressed height? How do you know what size bags to run front/rear? I recently purchased a 99 cc dually lwb.It has a static 5/7 drop with spindles and springs in front a flip kit in rear. I have been talking w/ lockone about sizing on some 22's and I would like to get this thing on the ground as well.This is my 3rd lowered trunk,but they have all been static dropped and I don't know anything about setting up bags. Any and all help would be great.

Re's seem t be the bag of choice from what I have read, but can someone give me the low down on single and dual ports, and is it different for the rears??

Single ports have one inlet / outlet on the top. You need to Tee into them to have an inflate and a dump valve. With Dual ports you can either run 2 lines with 2 Tee's to fill and dump fast, or have one port as a fill and one as a dump.

I run the HE for the higher PSI rating, but plug the 2nd port on the bag. Running dual ports gets to be a pain cause its just more airline you have to route. But this is personal opinion... I dont know how much faster it would help pick up a 1 ton, but I know I had to put slowdown fittings on my dump valves cause it would drop like a boulder falling from the sky.

Oh, and I ran HE7 in the front and 8s in the rear.