[LMH]

I feel like street cars should have a filter. We used to run open velocity stacks on the track in Porsches but on the street, we used a large air cleaner that was open across the entire top. I doubt that style filter would fit under the Cobra hood though. That's one of the down sides to Weber carbs.
I have no experience with the little flat filters but they seem like they would be very restrictive.
The screen would not be much filter but would keep rocks out! Beyond that...!

Not much help am I?
Larry