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Old August 10th, 2010, 15:50   #3
TDIClub Enthusiast
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Join Date: Jun 2002
Location: Nashua, NH, USA
Fuel Economy: Who cares? It's a DIESEL! Great fuel economy comes as a bonus!

K&N filter media, notice the sunlight passing thru the filter!

dieseldorf's K&N "lie detector" test:

From what I can tell from the dyno plots:
- 1st run: Baseline with NO FILTER installed. EMPTY airbox!
- 2nd run: Stock OEM paper air filter.
- 3rd run: K&N air filter.

ZERO performance improvement observed with K&N compared stock OEM paper filter or even NO FILTER at all! We've seen this all the time in the numberous K&N threads..."It (K&N) just HAS to be better!" OK, based on what?

As I've said in other K&N filter threads:

K&N filter = MAF eater + engine sander + ZERO performance benefits = BAD!

Stick to using only OEM filters:

I use the cold climate version OEM filter, shown in the above pic. Here is an end-shot view:

I use the cold climate version year round in my 02 Golf because I removed the snowscreen in the intake snorkel due to it regularly getting clogged with bugs and other debris.

Cold Climate version part number: 1J0 129 620 A
Standard version filter part number: 1J0 129 620

Note the "A" on the end of the part number is for the cold climate version.
Why DIESEL is better: (Courtesy TDIclub forum member wxman)
PM -
Air Toxics -
Ozone Precursors -
General -

Last edited by n1das; August 10th, 2010 at 16:50. Reason: D'Oh!
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