CSK-C23-20.1 / CSK-C23-20.1 - Application Notes CST 9-11" Lift Kit - Dual Shock Setup - CST Shocks (No Torsion Keys Included - At 11" Ride Quality May Suffer) 2001-2007 Chevrolet Silverado 1500HD / 2500HD 4WD w/Non-Allison Transmission 2001-2007 GMC Sierra 1500HD / 2500HD 4WD w/Non-Allison Transmission Kit Includes: - Drive Shaft - Dual Shocks Uniball Upper Arms - Dual Shocks Hoops - 8" Rear Leaf Springs - Front Sub Frame - Related Bracketry - Steering Stabilizer - Hardware - CST Performance Shocks