I had the Strutmaster Coilover replacement shocks installed on my 92 Buick Roadmaster in the rear to replace the factory air ride system. I also had new KYB gas-a-just shocks installed on the front. This was done at my regular repair shop for $220, labor. After a short test ride the improvement is very noticeable and the car rides about 1.5 inches higher in the back, I measured before and after. I am very pleased, car rides better and no more compressor running every 15 minutes.
Strutmaster Bought mine in July. Every time I parked the compressor who run. Put the Strutmasters in and all is good. Before and after pic's. You can see the ride height different. Also put in new Moog rear coils.