I would like to know if there's anyone who have done the 'parallel fuel rail' mod N/A or turbo'd. I was thinking of doing this mod because the Subaru techies stated that the 3rd chamber runs lean because of the way the fuel flows (in series). This will, if not fix, give the same amount of fuel to each chamber. Performance? Lowers fuel usage? I would like to know the stories behind it. Thanks.