Chris - It looks to me that the air filters are not in a sealed enclosure to the outside air inlet. Based on other's testing of the airflow through the engine bay, it would lead me to believe that you are still receiving air from under the car as your primary source. Owners, who have been down this path, claim the airflow will be form inside and out your gill at speed. Have you had an opportunity to run an temp probe to confirm that you are getting cooler temps at that airflow location? I am currently building an enclosed system based on other's observations and testing.
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