Have you ever felt the heat under a hood when the engines running & the hood is closed?? if you ever get the opportunity to have the car up on a ramp with the engine up to temerature you'll find that the air from the engine bay is very hot. Just by putting a shroud in the way of the airfilters isn't going to give the engine the nice cool air that it really needs, why do you think race cars seal off any heat to the carbs to get "cold air induction" from outside the engine bay??
Far better to seal the carb base form the engine compartment so's it can only breath air from outside. I'd be interested to see a comparison test between this & a genuine cowl induction set up to see how much horsepower difference there really is.
cheers...Nige
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