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If you can bend or maneuver that aftermarket air tube so that it draws air from directly above the catalytic converter you will have a "warm air intake." Many of us have had success with those. The warm air is less dense, and therefore less oxygen get to engine. The engine will reduce fuel to maintain the 14.7:1 air/fuel ratio needed to burn the gasoline. But you'll have to push the gas pedal further to produce the same power. Doing that opens the throttle plate further. Opening the plate further reduces the energy lost as the engine tries to pump air to mix with fuel. Reduced "pumping losses" seems often to mean improved fuel economy.
I hope that helps.
James
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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