I got a new one from Bill at A+M HighTech Auto. It has in and out stampings. The return line does not have an actual "orifice" in it. It is simply restricted by the size of the outlet nipple. The nipple ID was ~0.115" - which is a lot more area than the factory specified 0.060" (almost 4 times as big an area). I soldered the end closed and drilled a 0.040" hole.