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Supplied Vehicle Information for ZONF30N
"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 drivshaft alignment kit may be required. It is available in the optional accessories (part # F5401).
Although extremely rare, front drive line vibration may occur.
Rear box kit not designed for dually models.
Front exhaust modification may be required to clear the front driveshaft on gas models."