I have a set of Double Adjustable Koni Shocks for sale that I removed from my 99 Firebird Formula when I sold it. I had the shocks for about 40k miles and they are in excellent condition. I had the rear shocks degassed and revalved for lower compression by ProParts USA (authorized Koni dealer). I paid about $1350 for the shocks new. Willing to sell for $500.

email me at marcfs71@earthlink.net if interested