hi guys ive just got ym FRS and i want a dump valve. wot will be the best type? reading about GGR ones which give a chatter noise i thought this would be bad? as back pressure hitting the blades of the turbo i thought was exactly wot a dump valve is suposed to stop. im confused about which one to gte. people keep telling me differnt hings. it seems the bailey dump valve will be a good safe bet??? if u were me, please tell me wot ud do. cheers guys. xxxx Rob.