[ http://twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=942653&forum=technical&dtSearch=0. ] I purchased them from member J.Heath (Mobile,AL) and was told they have Garrette acutator on them. They are good for up to 24-26psi and currently set at 12psi base boost with the boost controller off! Does this sound right! If so I shouldn't need different acutators right? All I will need to do is slap them on and do any additional grinding? Anyone? Thanks guyz MIKE