ddranged
+1y
the 2.5 in my truck is returnless, well technically. if you pull the pump out there is a small regulator looking thing that is brown in color. and basically if the motor doesn't need what is pumped it pours directly into the tank. that is the only thing taht i can figure. and that is what the auto parts stores said around here. i just put the factory pump in my fuel cell and used a high pressure regulator with a return.