[jmatta]

I completely agree with Jaxonalden; I've been using K&N filters for years on my 911s and clean them at least once a year (more often with the track car).

My '73 is equipped with Weber 40 IDA triple throat carbs that have jets which are very sensitive to small dirt particles. I have not had a problem related to air filtering to date. My Box S with the cone gauze filter also has not caused any problems with filtering or MAF issues (but I sure love the sound!).