* Removal of the factory rear block is required. Net rear height gain will vary based on size of the factory block, but will result in a level stance.* If equipped with a 2-piece rear drive shaft, then a carrier bearing drop kit may be required. (part # F5401).* Although extremely rare, front and/or rear drive line vibration may occur.* Front exhaust modification may be required to clear the front driveshaft on gas models.