I once saw a cutaway view in a automotive magazine of the toyota air filter. It's a three stage filter for large, medium and extremely small particles of dirt.

It takes about 20 to 35 taxable horsepower move a car along at highway speeds. That may be on a level highway with little wind. It's been a long time that I saw a tv show about front wheel drive and taxable horsepower.

I figure the K&N filter people talk about is more for all out full horsepower. Something that I probably will ever need with this hybrid setup.