Well RObert of FAT insisted I get this done to the ol' FXT and so far w/out really gettin' on the gas, it's a noticeable difference. It seems to be a smoother idle, and smoother power delivery. He dropped the car off to me on my lunch break so could not really give it the gas it needed for the butt dyno to work properly, but the smoothness is noticeable enough. I'm gonna report any gains felt after my drive home from work this evening. Anyone else do this yet on their forester? Share comments/gains!