Rugged Off Road 5-5001 1" Rear Block Kit for Ford F150 2/4WD For 2004-2017 Ford F150 2WD/4WD, includes longer U-bolts to use with factory blocks. Comes complete with vehicle specific U-bolts and hardware. Adds a nice rake for towing or hauling additional weight in the bed. This is a true bolt on application - no modifications required. Your Rugged Off Road product automatically includes our 5-Year/60K mile powertrain warranty free of charge.