What are these?

[Cuatro]

So these are currently for sale on craigslist. The list says they are strut airbags. Obviously there are no bags but there is obviously air fittings. Just curious what exactly they are and how well they work... Thanks.

[soab]

How much do they want for them?

[NegativeCamber]

They are air cylinders. I'd advise against it. It requires higher pressure to get the car up compared to air bags and they need to be rebuilt because the internal seals wear. Also, because they do not expand like air bags, you need an air accumulator for each corner to assit in damping the ride because the cylinder is at a fixed volume.

[Cuatro]

Ok I see. That's kind of what I figured. So would they be more useful if they were used as a "helper" setup? As in with low pressure the full weight of the car would be sitting on the springs at a low height but when pressure was applied they could help lift the car a couple inches? I'm just curious because they are cheap and would fit my car's suspension set up very well if they could be used in place of the shocks as a helper.

[bobbyjones]

i've seen those things before...on shitty carnival rides.

[Rocknthehawk]

They were mostly used on show cars before airstruts were available and practical.