2001-2010 GM HD / GM 1500 Economy Leveling Kit (110-90591)This kit consists of torsion bar keys and shock extenders to be used with OE or OE length shocks. Features Yields 2 Inches of front lift Forged steel torsion bar adjuster keys 1 2 Inch Extenders for OEM front shocks Uses OEM upper control arms Improves vehicle look and reduces factory nose down rake Maintains adequate droop travel to retain ride quality Fits up to 33 Inch x 11. 5 Inch tire, 9 inch wide wheel with 5. 75 Inch back space 2 hour DIY