Sup y'all,
has anyone had prop valves constantly let go on them?
Recently stuck a 96' spec ITR Booster + MC into car with Wilwood calipers.
The stock 30/40 Prop valve shit it self, right where that black rubber seal is.

Got a nice 40/40 from a 98 DC2 and BAM! Leaking from seal again after a hill climb.
It was fine after install, checked all the lines prior to the run. No leaks anywhere, brakes were awesome. No pedal slowly sinks >_<!

Any ideas?
Cheers.