Took your advice and have joined NASICO. Found a guy who converted to headers that may sell me what I need. Considering the only upgrade is the exhaust system and the tune concerns it brings I am tempted to just go back to stock and be happy. Been driving Subarus' for 30 years never upgraded from stock figured what the heck try something new and old school thinking it has to help. Thanks for the info will do more research. Understand the concerns of the wrap on the headers, would look really good, why are so many on the Impreza site changing to them? Not daily drivers? Will say my cars do not leak oil, no brag just fact. Even my old british ones if it starts leaking I'm pulling it. thanks again