I used to pull up to 1100 kg's (braked) behind my Legacy VZR AWD non turbo. Look out for manufacturers weight limits on towbar though.
The maximum tosing capacity of the 2009 Subaru Legacy is 2700 lbs..
The maximum tosing capacity of the 2006 Subaru Impreza is 2000 lbs..
The maximum tosing capacity of the 2011 Subaru Forester is 2400 lbs..
The maximum tosing capacity of the 2013 Subaru Outback is 2700 lbs..
The maximum tosing capacity of the 2012 Subaru Tribeca is 3500 lbs..
The maximum tosing capacity of the 2009 Subaru Tribeca is 3500 lbs..
The maximum tosing capacity of the 2011 Subaru Outback is 2700 lbs..
The maximum tosing capacity of the 2012 Subaru Forester is 2400 lbs..
The maximum tosing capacity of the 2013 Subaru Forester is 2400 lbs..
The maximum tosing capacity of the 2005 Subaru Outback is 2700 lbs..
The maximum tosing capacity of the 2011 Subaru Tribeca is 3500 lbs..
The maximum tosing capacity of the 2008 Subaru Forester is 2400 lbs..