I own a 2007 Subaru Legacy. I will be installing header, uppipe, downpipe. I have a GT3076r BB laying around. It is a direct bolt on and I am looking to run factory boost. I called around to a few shops and they told me that I would need to upgrade the fuel system, to build the motor. My goal is to upgrade my exhaust to stage 2 and install this turbo for the quicker spools. I am not looking for large horse power gains just whatever gains I can make off the exhaust mods and the the bigger turbo.