Greetings from down under. Got myself a '91 Legacy RS and was wondering about Blow-off valves. I assume they didn't get fitted as standard?? If not, which one to fit? I've read a litle about them and the recurring theme seems to be "always fit an INTERNALLY venting one, NEVER an external one", as you screw up the air/fuel mix....any thoughts/comments would be appreciated.

Cheers
Rob