I'm guessing it may lose some power-- how much? Who knows, it not just the amount of air flow but also the path it has to take as well. I learned some interesting things on my current engine when we had it on the dyno, even when I added just a 45* bend to the intake tubes it hurt the power 30 hp vs having the filters bolted directly the the tb's. The air wants to take the straightest path possible, the closer the filter is to the hood the tighter the turn is going to be into the carb. Those small holes in the back of the hood are going to cause more turbulence vs having a wide slot.
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