Are you converting something? What are you using it for. There is a thread that the prop valve was thoughly discussed. Since then I talked to Brian at Fast Brakes and we both agreed that the differences are very small if any. In 99.943225656452% (pissedoff's style number) of the cases you will not know the difference.
Do a part search in the online honda dealers and see if the part number is different.
I doubt the the prop valve is different between ABS and Non-ABS.
What is stamped on the outside.... 4040?