I have an adjustable shock set-up for sale. They come with multiple spring options. All the springs are 2.5" and work with the Ground Control collars that come with the set-up.
I used this for auto-x and had great results. I also drove this about 4k miles a year on the street, mostly to and from auto-x's and I think it rides perfectly fine for the performance capability.
The fronts are Koni Sports that have been re-valved with Koni Race valving. The original owner of this set-up (gotpsi? on this forum) had it done by PSI.
They are not gas charged as apparently PSI does not re-charge them after re-valves. The shocks are at least 3-4 years old. They are in perfect working condition.
The rear shocks are Koni Race and are about a year old. They are in perfect working condition.
Currently the set-up is 800lb front springs and 500lb rear. Both are 6" length. They are assembled with NA mounts. I can only assume the bumpstops are cut in half Koni units. Ride height was 4" pinch weld.
I also have in 7", 700, 400, and 350 pound springs. And in 6", 450 pound springs. The 700 and 350 are the oldest, 3-4 yrs old at least. The 800 have been on the car for a couple of years and the 500 maybe a year.
The 400 have about a year worth of service. The 450 have one event/weekend on them.
Everything delivered to your door in CONUSA for $1,000 with all fees included. Spare springs alone are $60 each if buying new so that's $480.
If you are not interested in the spare springs, $850 with all fees included. I will send you the shocks with the springs of your choice from what I have available.