Does the DEF Tank need to be removed to use an S&B High Capacity Fuel Tank? Support Updated August 07, 2023 01:57 Follow You do not need to remove or relocate your DEF tank to install any S&B diesel fuel tank. Related articles Filling fuel in S&B Tanks. Venting. Rollover Vents. EZ Lynk Error OX1 When Calibrating S&B Fuel Tank on a Ford Truck Slow Leak at Sump on Diesel Fuel Tank How much horsepower will I get from an S&B cold air intake? Will the SPE Fuel Filter Kit fit with the S&B Tank (10-1004) on 2017+ Powerstroke 6.7L Short Bed? Comments 0 comments Please sign in to leave a comment.