6psi isn't working for me anymore and I don't like my controller. I want at least a 15psi spring but will consider between 12-18psi. Its needed for a 38mm "Tial" wastegate. Shoot me a price and Ill see what I can do. I'm kind of in a hurry but not a major one as I still have to order my replacement line for my meth injection and get a few other things done before my next track night