This white plastic assembly is the fuel pump basket from an ’11 Mustang GT. It houses the fuel pump, fuel-pressure regulator valve, and the fuel-level sender, plus various hose nipples, filters, and other accessories. One of its main purposes is to form a reservoir of fuel around the fuel pump to avoid fuel starvation. One of its largest practical considerations is that its many jobs and complex construction makes it difficult to modify or replace. Here Ken has his left hand on the fuel level float and his right on one of the stainless steel rods that hold everything together.