is a 90-91 CRX Si rear prop vale the same as a 90-91 NON ABS Integra prop valve?

i dont think so. the stampings on the crx valve i got is "1725" and the da's say "4040",
but my friend swares too me theyre the same......

what's yalls input?

 

They are different.

 

i thought so.....can you explain?

 

would a 4040 valve on stock ef/ed brakes provide any better performance? what would the change in bias be? has anyone tried it? i did a search but found nothing