Originally Posted by PK_Celsior

the cup kits is not meant to hold air!! it will only hold air for a period of time before it lowers itself back to where you have your coilover adjusted. cup kit are mainly just use to get over a speed bump really quick and thats it.

Originally Posted by Schnitz

Sorry, buddy of mine has Airrunner and I saw it before it was installed. Not impressed at all. KYB shocks with sleeves and ALL the other components were garbage (compressor, valves, lines, tank, guage...). We replaced every single additional component with DOT approved pieces where possible and much much better components otherwise.
From my experience, you pay for customer service with Airrunner. They bend over backwards.
My point of view, build quality components and there should be no need for after purchase service.
That being said, my D2 struts & double bellow bags, Dakota digital air mgmt, Viar compressors, 3/8" lines and DOT approved aluminum tank have done me well for over a year now including a Canadian winter.
If you are mechanically inclined or have a dependable shop, I'd say piece a kit together yourself every time.
UAS bags over your choice of coilover strut (BC Racing, Megan, PBM, Tein etc..) and Accuair or Dakota digital mgmt would be the setup I'd recommend.