I've got the exact same car. 2005 Legacy gt in GRP 5 speed. I'm so sorry this happened to you. Someone must've dogged the hell out of it. I'm at 103k on origional clutch, turbo and all. Good luck on your build, engine and audio. I did a full system in mine. The toughest thing you'll run into audio wise is running cables. Save yourself the headache and take the seats out. There is not enough room in the frame rails to run much more than 4 gauge and that was a pain. Good luck on your build and if you haven't been there yet, get on legacygt.com. It's a great group of enthusiasts.