They work fine, they are just prone to leaking, and obviously less sturdy than the metal ones.

 

id use a monza BOV, thats what im using and its great.

 

i hate a type s from GReddy, at 8 and up to 11psi with no filter on the turbo that thing cracked like a whip on whitey's ***.

 

LMAO, funny

 

I'm giving those plastic Bosch BOVs a try. So far they don't leak. They cost 33 bucks at advance autoparts. They are oem on 1986 porsche 944 turbos. They call em somthing different than bov. They are supposedly good for 10 psi.
Erich