For Chevy Silverado/Sierra 1500 GMC 2007-2018. Product Type: lift coil spacer. Lift Height:2.5"F+2"R. 2.5" Front Lift Spacer X2. 2" Rear Lift Spacer X2. Material:Billet 6061 Aluminum. CNC machined billet aluminum construction for maximum strength and increased safety.