The WRX that runs in GT300 has been AWD since the middle of last season. Since the team isn't big enough to get the car competitive when it was RWD, but for 2006 they had a new chassis and stuff that was a lot stronger and lighter so they took the weight penalty handed out to AWD GT cars since it didn't affect them as badly as it would have with the previous chassis. When the new GT-R comes into GT500 I imagine for the start of the 2009 season, perhaps late 2008, it probably will stay RWD however and not follow the Cusco Subaru team into trying an AWD car as they'll want the transition from Z to GT-R to be as smooth as possible without any giant differences, similar to what Toyota did changing from Supra to SC430.