Bilstein 5100 Gas Shock & Stabilizer Kit 99-10 Silverado 2500 HD w/0-2.5"Lift Part Numbers 24-186735 and 24-186742 and 33-174525 Set of 4 Shocks & One Steering Stabilizer for vehicles at factory height or w/0-2.5" front Lift and w/0-2.5" rear Lift Fits 2WD & 4WD vehicles All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Bilstein's Limited Lifetime manufacturer's Warranty protects against defects and premature failure.