silent BOVs??

[rx2mazda]

as long as you get the bosch with the brass internals your fine. I rode in a TIII csx pushing 30lbs and it didn't leak.

[scuderiasteve]

get a EWG they seem to be a lot quieter than the BOV's rushing 100% vent

[johnturbotron]

The stock Evo IX aluminum diverter valve routed back to the intake is pretty quite and is good up to 26 pounds of boost.