I have removed the resonator box on my 00 DX and put on a bit of metal flex-tubing sucking air near the header as an experiment.
My findings were that in the coldest winter months, it is a big benefit in getting the car warmed up quicker. That alone saves alot of mileage for me. However as soon as the cold weather is gone it quickly becomes too hot (140+) and needs to be put back to a more normal location, like behind the headlight.
I have not tried it without a tube...but I'll give it a shot for grins.
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