Eliminate the factory rake on your Silverado, Sierra, Avalanche, Suburban, Tahoe, Yukon XL or Hummer H2 with the Superlift reindexed torsion keys. This allows a larger tire size and is ideal for restoring front height if a heavy bumper or winch is installed. Shock extensions are included as well to eliminate the need to purchase longer front shocks. Torsion bar suspension vehicles can achieve from 1.5" to 2.5" of front lift. Superlift keys are indexed differently from factory keys to increase torsion bar rotation and lift. As the new keys are loaded, this applied torsional load to the factory bars to lift the front of your vehicle greater than the stock keys. Kit FeaturesTorsion keys Shock extensions 10.9 grade metric hardware included when needed Lifetime Warranty Satisfaction Guarantee View kit installation instructions</strong