Hoping someone can get me some answers here. 2018 mustang GT full road race build. Ditching the stock fuel tank for a 22 gal fuel cell. my question is about the fuel pump / fuel system. It's my 1st foray into the mustang world so a little clueless no matter how much I search about the fuel system. Trying to fig out what pump to run in the cell (will be in a trap door sump) and how it's regulated if I want to keep the returnless factory style system. Stock (or less with the restrictor) horsepower. Am I correct to assume that with all the factory wiring and modules that it regulates itself via input power to the pump? And if that's the case what pump should I run in the sump to wire to the factory harness? I have disassembled the factory bucket from the oem tank so I have the pump from it I can use but didn't know what the other round thing is next to the pump in the basket is and if its needed. looks like goes out from the pump into this thing then out to the fuel lines to the rails. if its not needed and its just drop a pump in the cell and wire it to the factory system and go then that would be the easiest and best lol. Thanks for the replies and help in advance.