The 2 inch systems we recommend for the 4wd S-series vehicles are made by Superlift. This kit will slightly firm up the ride quality. It comes with new greasable upper control arms, torsion bar adjuster arms (not included in ZR2 kits), inner & outer CV shocks with boots and all necessary hardware. This kit allows you to maintain the factory torsion arms. Due to the smaller size of the S-series vehicles it is not necessary to use heavier than stock torsion arms which often times firm the ride quality even more. Front and rear Super lift shocks are included. The rear lift is achieved using add-a-leafs for the Blazers and shackles for the Pickups. The Deluxe package also includes a steering stabilizer.