Rancho RS66352R5 Level-IT Torsion Key System Fits Sierra 2500 HD Sierra 3500 HDSuspension Front Leveling Kit Level IT Torsion Key System Level IT Torsion Key System; 2. 0 in.; Incl. Torsion Keys and Front RS5000x Shocks; SPECIFICATIONS: WARNING CA Proposition 65: No FEATURES: Eliminates Factory Rake And Evens Out Truck'S Stance Accommodate Tires Up To 33 In. Rear Shocks Sold Separately Keeps Factory Ride Quality For Dependable Performance Designed For Heavy Duty Trucks Torsion Keys Feature Construction For Long Life And Durable