Ok, I have got a few questions about ECU's and boost control. I was wondering how safe adding a manual boost controller really is? I know this is going to start a heated discussion, but i have to get some opinions. I know a lot of you guys have MBC's, but the thought of raising boost pressure in my Saab to 20PSI kind of scares me. I really would prefer not to blow the head gasket or head. What are the actual specs that a saab 2.0L motor can handle for boost pressure? My question about ECU's is this, say you have stage 3 mods done to your like a 3" downpipe and filter ect., would you request a stage 3 ECU? Are there actually different ECU's setup for different modifications? Your reply's and answers to these questions (that have been driving me crazy)are greatly appreciated!