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I think this design is very interesting. Perchance, cost aside, did you calculate the total square inches of your single panel filter solution VS. the total square inches of the K&N 9" round filter and the Xstream K&N top?

It would be interesting to understand how close in total filter inches these two solutions are. Reason I ask is that one would imagine that one of the restrictions of air flow is related to the total square inches of filter material and its placement above the carburator throats.

The new Barry Grant / Demon catalog has their new Flying Wedge filter Assemblys. Did you see those?

Also, at speed, what keeps the foam ring (which surrounds 3/4 of the air box), at the back of the assembly from blowing out (or bending) the back?

It would appear that at high speed, the force of the air, through the hood air scoop would slam into that foam at the back and kind of push it backwards towards the firewall or bend it backwards? Have you run into this? Perhaps your design accounts for this but the picture does not show how you have accomodated that force.

It looks like you did a nice job. Good work. Keep us appraised.

I would assume you will do a chasis dyno of this and then remove it and do another run with your "previous standard" air filter to see if you have improved air flow?