Go for what BL did and use a bi-metallic strip to automatically control it.
----- Original Message -----
To: <mgs@Autox.Team.Net>; <mgb-v8@Autox.Team.Net>
Sent: Wednesday, October 13, 2004 12:20 AM
Subject: duct valve source
> I'm running a 2" air line from the front (by the radiator) back to the
> footwell area and I'd like to have a shutoff in the line for cold weather.
> can't seem to find anywhere that makes these, although every car has
> it. I'd like a plain, manually operated flap valve that shuts off the
> and can be actuated via cable. Does anybody have any idea where I can
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