well, actually, the idea is thus:
The air-thingie spins the air in the intake causing it to go faster, making a partial vacuum between the air in the intake and the air outside, forcing more air into the intake. The limiting factor is the air filter. No little doilie it gonna replace a well-tought out intake. These metal works of modern art block any airflow they might have created. The theory behind these was based on the idea of Tesla-Turbine that used groved and ported sides of a pipe, and only had an effect at about 25-30 PSI...way more than a naturally aspirated engine can come close to. Plus they cost more than a K&N drop in and they have the side effect of not working. I would rather stuff a mouse in my intake.
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