Looking for a quiet BOV which can take up to 15psi of boost. Is it going to be Greddy Type S or Stock? I saw a posting somewhere saying stock BOV is only good up to 12psi, is it true? Thanks.

i love my greddy type r https://www.nopistons.com/forums/pub...DIR#>/wink.png

Anyone know what psi the Type S is good until?

i'd assume 15-18 psi

So we think Greddy Type S is the quietest one, quieter than stock?

The stock is fine. I ran mine at 15psi with no probs



STEPHEN

i used to work at a shop, and we were always getting greddy type-s' in for warranty exchanges...their garbage from what ive seen, atleast under high boost conditions...if its on a honda or something they'll work ok.



i have the hks ssqv and i like it alot https://www.nopistons.com/forums/pub...IR#>/smile.png

Get the Greddy Type R. It'll handle whatever you want and is quiet as ****... https://www.nopistons.com/forums/pub...IR#>/boink.gif

a nice quiet bov that looks and sounds stock is the KKK units used on many turbo german cars.

i used to have a KKK bov from a audi quatro on my TII and it was just as quiet as stock, yet it is for higher boost aps than the stock mazda on.

















find a junkyard with a saa 9000 turo, or audi turbo, and get the quet bov u r looking for....

the greedy type R is valve for high boost (i have one) but not as quiet as stock..............

Can't seem to easily locate any KKK BOV. I guess Greddy Type R is the one to get despite the reliability problem menacefd3s mentioned.