In 2004, Subaru gave us the Forester XT, the first turbo Forester in the US.  It featured the same EJ255 engine found in the LGT and 2006+ WRX and the smaller TD04 turbo found in the 02-08 WRX.  It shares a lot of part compatibility across the 02-07 Impreza models but has some unique fitment due to its chassis.