2007-2014 TUNDRA 2WD / 4WD (Required for 3-4" Rear Lift) When lifting the rear end of the 07-13 Toyota Tundra trucks by 3" or more, it's recommended to use a carrier bearing spacer kit to eliminate possible drive line vibrations. SPECIFICATIONS Rear Brake Line extension brackets Carrier Bearing spacers All Necessary Hardware Included DIMENSIONS: 9x4x3