Kan noen bekrefte/avkrefte dette? (ang. Luftfilter til M40)

[Schnellfahren]

http://www.bmwe36tips.20m.com/replacement-element.htm

Jepp, les (nederst på nettsiden) om hva det står om M40 motoren:

Note that on the M40 engines you get no power increase at all purely as the engine use a method of metering the air that only measures from idle to 3000rpm, after this the air isn't metered and any intake flowing more air than the standard setup causes the engine to run lean as it uses pre-programmed fuel curves - this will *cost* you power and increase emmisions as the air/fuel ratio is wrong!

Siden virker jo seriøs...

Noen som vet?