I don't know f they have a size for the Tig, but I use the AFE Pro Dry filter on my A4. Works great. No oil to foul up the MAP sensor and still washable. Much more sturdy than stock also. Ordered from ECS.
W/DI you DO NOT want anything other than the best possible filtration to keep the dry valves clean, which paper offers. Don't f with it too much, dust and sand in the engine can cause extreme wear. What a lil more flow or whatever, take out the diffuser under the filter.
Again, don't make a mess of the airbox and don't change the filter more than necessary, 30-40k.
I'm curious, do you like the K&N. Do you see any improvement in either performance or fuel economy?
to be quite honest... I noticed very little to none improvement on gas consumption but one can only truely tell in summer. I consumed a lot less than last year but in Chicago you can really only go my temperatures. This winter has been no real winter (it was quite warm for this place) so fuel consumption was better to begin with. One can't give the fuel filter credit for that... so in summer I will know.
Performancewise I think it does have an effect past 5,000 RPM's when you push it otherwise no difference at all...
Now with people mentioning that it's rather "dangerous or risky" to have one installed I might even take it out again. Don't want to risk more wear and tear just for having a minimal increase in performance.... I mean... what are we talking about here... We are driving Tiguans with 200 brake horse power... That's not a performance car... not even with 50 horses more...
I installed it as I thought it would be technically advanced compared to the yellow klunky paper thingy that was in there before... but now tat people say the K&N is not safe I am on the edge of switching back...
This argument has been waging for years, and is like religion and brands of oil to use. If you do dome intense Google-ing, there are many reports for and against. I recall one where testing determined (and I use these numbers as an example, they might not be bang on) K&N filtered 97% of the dirt and the stock filter was at 99%. So you say, what is 2%, but the article went into how the test worked and what exactly got through and that 2% was like a a cup of sand into bathtub. When I read the article, I was convinced to not use one, especially if you live in a dusty area.
To add a little more to the conversation, K&N filters do let in more dirt regardless of how much. The best filtration is the OEM paper type. Will you see/feel a power increase from a drop in K&N filter? No.
The increase of HP comes from replacing the intake tubing and baffles. And you still wouldn't see too much of an increase. Especially on the Tiguan. If you look under the hood you can see that the Tig's piping looks like an aftermarket CAI (i.e. it's round with minimum bends).
There is a company out there, forgot the name, that lets you mix and match parts for your air intake. So for my 05 Dakota I was able to replace the piping (baffles that made the intake quiet) and I was able to keep the stock paper intake and air box. Best of both worlds.
Also if you get a full CAI setup the you remove the air box that keeps water and dirt from going into the filter. That's why I really liked that mix 'n' match company.
the k&n filter is not a big performance gain but in my wife's tiguan we have the full BSH intake pipe and a newspeed p flow with a k&N filter and we can tell a big improvement in power and a small improvement is gas mileage.