in reguards to drg84 if you use the powerhouse bags from universal air you wont have any problem with weight or just use the double play, plenty of travel and very strong they use them on full sized trucks with out any problem and they keep the same diameter. i absolutly hate i mean hate hydrolics i dont care who installs the system you can basicly junk the car after a few long trips, if you keep the car on a trailer go ahead and run a fluid system, but if not use air because if you blow a line all you need is a hose clamp, a shrader fitting, and a hand pump or one of those little co2 pumps tha you put in your pocket, with hydros you blow a line the fluid will rott your car to the ground the weight of the system alone will destroy your car and then you have no space in your car for anything, if you run air you can still have your sound system and your back seat, with air the only thing you ever have to worry about is blowing a bag ind that is highly irregular if installed correctly and usually never happends unless you are hopping, oh and one other thing if you have a set up like i do i have a fitting on my tank that you can put an air hose and air up your tires use any air tool, i even built a little jack that is an airbag so i can change my wheels when i go to the track!!!! beat that with hydrolics you may be able to pull a wheel up to change your little doughnuts but if you ever run thatcar on the strip it will be useless trust me i use to have a monty carlo with a show hydro system i got so sick of the ride the way it handled and everything else about the car (dont get me wrong it was a nice car and i had lots of money in it) i ended up going to a car show and the ride about killed me so i wend around the parking lot untill i found some one driving a 80s toyota and traded the the guy strait up yes i probably lost $10,000 but id rather have my TOYOTA!!!! any day