Do you need a sump kit to install a FASS Diesel Fuel System? In this quick video, Brad explains the advantages of utilizing OEM components when upgrading your diesel truck's fuel system. Despite some popularity among diesel owners, sump kits are an added expense that don't typically deliver many benefits. For maximum reliability and range, we recommend integrating your FASS Fuel System with the factory sending unit. Best of all, there are no extra parts to purchase! | FASS Fuel Systems