I'm looking for a picture of the underside of a 2005-09 Legacy that I can use to start designing a full undertray. I just moved and adopted a commute of 80 miles/day, so I've become somewhat sensitive to fuel economy. The Spec B is actually not bad on gas for what it is (currently just shy of 30 MPG average, still need to refine my hypermiling skills), but there's always room for improvement. I know the car already has a fairly comprehensive undertray but there are still a few areas that could be better - transmission tunnel, rear suspension, and spare wheel tub off the top of my head. I'm also planning on blocking off the upper grille and making some fog light covers.
Initially I had been planning to pick up a Mk4 TDI Jetta as a commuter but the recent fall in fuel prices have made that less of a potential saving. I still might do it just to keep the mileage off the Legacy but I would rather spend 2 hours a day in a Spec B than in a 12 year old VW.