I ordered one a couple of months ago for my 2000 740il. It arrived and I was really disappointed. It was a cheap piece of stainless steel made in korea. Must have cost all of $2 to make. It didn't fit into the air intake like it was supposed to and I got cut on it to boot. So, back it went and I'm out the shipping and handling. Don't bother folks. It isn't worth the aggravation. I caught the end of an infomercial on the Tornado which claimed increase in fuel efficiency/mileage and a "guaranteed" 5-20 HP increase. It consisted of a special fan that attached the the air intake that makes the fuel/air mixture more efficient. Does anyone have experience or heard of anyone using it?