First, you have to have coil overs with no more than a 3.5" OD spring - that means you can run the 110mm air cups. You will have to grind away a little bit of the upper inner control arm shaft (a few mm at most) - NOTE: this measure ment made with suspension hanging. I believe the clearance increases when compressed - but you need to verify that.
Stance makes 120mm cups but 110mm are available for no extra charge.
There are 2 options: w/air tank or w/o air tank. Here is a $680 kit for w/o:
https://www.springrates.com/products/stanceparts-universal-tankless-air-cup-kit-front
The tank costs more, could be $800.
There are a number of places that sell this kit, prices vary, but the $680 was the lowest I could find at the time.
I thought about installing on my 96 GTS which I'm selling, but decided not to because of the effort to locate, wire and plumb the various components.
But I would have done this in a heartbeat if it was available 20 years ago when I bot it!