Bing!!  That's what I was saying.  Explain how the MAP sensor gives a
crap about what filter is on there.

Or no filter?  Lots of airflow for a short time.

The data sheet on the K&N filter will explain it for you.  The minimum
particle size it will trap is larger than that of typical paper filters.

If you want more airflow through a filter, you either need to increase
the surface area or increase the minimum particle size you can trap.
There is no magic to this.

If you are in a racing situation, a high-flow filter is definitely a good
idea.  If you are driving on dirt roads, a high-flow filter is probably
a bad idea and in the case of the K&N you will see dust trapped in the MAP
and throttle after a couple thousand miles.

Personally I wouldn't worry about the MAP so much as I'd worry about
increased cylinder wear.

In a street vehicle, if you want increased air flow, your best solution
might be a much larger filter or dual filters.
--scott

Sir Hugh,

You'll have to explain how using a K&N brand panel airfilter in lieu of
the normal paper airfilter will allow "crap" to reach the MAF.  Do you
have some direct experience in such crap infestation, or are you merely
parroting some other compaintant?

You forgot the added functionality of allowing crap to reach the MAF
causing it to fail and lose 50% engine power!

Depends on model but my E38 V8 4.4 had the original filter style but with K&N
replacement.  The only difference is that you don't swap it out just clean it
every 10K or so. No NOTICABLE performance increase.

However if you like induction NOISE then a complete intake kit would give you a
restless drive and make your car sound like it's being driven by a mindless
moron - you might get 2 BHP from it too.

Sir Hugh of Bognor

Just wondering if replacing the stock filter with the above would noticeably
improve performance or sound.

Any comments?