Blowoff valve - Wikipedia, the free encyclopedia
they don't make alot of noise at all. if the noise is whatg you're after the best bet is to get a 50/50 valve. it will make noise when venting higher pressure. gfb, aps, and a few other make them. the other is the hks which doesn't recirc at all but seems to have the best trck record and i think half of the subarus here use one
Last edited by fat angel; Dec 17, 2006 at 03:35 PM.