Generally Speaking an air lift kit consists of the following componants:
A Compressor and Air Tank.
A Compressor does what it sounds like it would; compresses air into our tank, much in the way that it would in a home or workshop air compressor. This Compressed air is what ultimately inflates your airbags.
A Substantially sized tank is required to provide enough air to the vehicle that you are installing your kit in.
A small tank is appropriate for a smaller car much in the way that a smaller garage compressor is suitable for light work. If a tank is too small for the application that it sits in, then it will result in slow performance, with the compressor needing to kick in to add air to the tank to make up the shortfall in air.
Shop Tanks and Compressors here:
A Controller and Manifold.
All that air and stored energy needs to be harnessed. The Controller is the brains of your system. Our most used are the Air Lift 3H and 3P. The 3H controls height and pressure. With added height sensors, the kit can defect changes in load in order to reset the cars level when required and the car to quickly switch between pre-determined heights. The 3P kit controls pressure only, which in term determines the level of operation.
These kits also have an in-built manifold which distributes the air appropriately to the 4 corners of your car and on-board bluetooth connectivity.
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Air bag suspension and shocks.
The more obvious component - the airbags themselves. Performance airbags feature performance shock absorbers, surrounded by an airbag which does the actual lifting of your vehicle.
As air is pumped into the bags, the bags expand, lifting your car front and rear to the desired height.
For some vehicles, shocks are available as airbags only or as performance kits.
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Air lines and fittings.
Generally Controller/Manifolds come with an option of NFPT (National Female Pipe Thread) or PTC (Push to Connect). NFPT allows you to use a selection of interchangeable, threaded fittings. The benefit here is maintenance, and flexibility. You can select right angled, or straight through fittings allowing you to get creative with the location of your install.
PTC fittings are quickly interchangeable, but generally not user-serviceable should the need arise.
Air lines generally come in 1/4" and 3/8" sizes. 1/4" offers a slow, regulated operation whereas 3/8" allows more air to flow through, reducing inflation times by up to half.