I'm thinking of putting on a K&N CAI, but I have a question; I was looking at the instructions online and at the end it states this:

WARNING: Please follow these installation
instructions carefully. The K&N

included with this kit must be installed on the
K&N

instructions will void your warranty.

What Is "harsh" weather? We get some nasty rains here in Florida and my concern is it'll such in water? Is there a need for concern? I know I have to cover it what I was the car but during heavy rains......

 

After reading many threads on this subject I've decided to stay away from aftermarket intakes. In my opinion, the risks outweigh any perceived gains.

I've read some threads where the owners were happy, but far too many where people ran into problems.

 

Yeah, I've seen those, especially MAF problems. But I only drive mine on weekends and myabe once during the week. I'm still on the fence.

 

Let's leave out the hp gain/loss as I havn't seen an individual dyno with just the intake.
The sound alone was worth it to me. Save yourself a headache and just get a dry filter. You can't blame it on the filter as no oil is used and you won't have to worry about it.
Injen/amsoil sells a dry filter with a perfect fit. It's about 50 bucks online. I can take a picture and look up part number if anyone want to know.

 

The oiled filters damage MAF sensors? This is absolutely ridiculous information. Who told you that? I've personally been running K&N filters on all of my cars for years without any issues. First of all, the oil that K&N uses doesn't conduct electricity. Second of all, you can take your MAF sensor and spray it down with the K&N recharge oil and it will function as intended.

100% complete false information that it will harm your car.

 

+1, I have one on my 911 with no problems, no check engine light or any of the other problems people bring up.
I have used several different brands including K&N, GReddy, HKS on different cars with always the same results......no issues.

 

You are entitled to your opinion, but to say that the information is 100% false is out of line. Do some research and you'll find that many people have experienced adverse effects from these intakes.

https://www.6speedonline.com/forums/...ough-mafs.html

 

I have a K & N, love it. Along with aftermarket exhaust, it sounds like a beast at low rpm, and a jet engine at high rpm. fwiw, my dealer, Rector in Burlingame CA, recommends them, and stocks the cleaner and oil. Well, they said they don't recommend them for all Porsches (I don't know which ones they don't like them on), but that they're solid on 996/997.

As to your original question, ya, that bit about inclement weather struck me too. What am I to do, see a little rain and swap out intakes? Call work and tell them I'll be two hours late? That's just stupid. I drive in the rain, no problems. The bag really does do a good job of repelling water and after driving through a storm for a couple hours it's still basically dry. I do put a towel or two over it when I wash the car.

Strange topic. Some, like me, think they're pretty okeedokee. Others insist they ruin MAFs. Both can't be true.

Don't sweat it. Buy the CAI. Or, or! Go old timey and disregard the internet wasteland, and call your nearest dealer and ask how many MAF failures they've seen due to properly installed K & N filters.

 

Wyovino, good point.

The dealer didn't tell me to install it, they said it was a nice mod. I shouldn't have said they recommend them. There's a difference. I should say, they "approve."

When I bought the car it already had the K & N. And Bilstein pss9s. That I knew. I didn't know about the exhaust. And I wanted it stock! I'm generally not a big fan of mods, not on a 911. But at one point I was talking to the mechanic, and I was skeptical of the mods, and he looked at me with a certain skepticism, like I was naive, and said, "You know, you've got a pretty nice setup here."

Since I brought it up let me be clear, Rector is a great place to service the car.

 

I'm not saying don't do it. There are many people who are very happy with their aftermarket intakes. I'm saying that after doing a bit of research I've decided not to do it. I'm still confused by the term "Cold air intake" as the K&N (and other) intakes draw air from the engine compartment, while the stock intake pulls air from the outside. Seems to me that the OEM box is really the CAI.

 

There is one in my car. Its been there for a couple of years with no complications (yet). Any significant water hitting the back of the car goes onto the filter. So, I park it under cover when its raining (mostly) and put a towel over the filter when I wash the car. I see the MAF and coil packs as as the modern day equivalent of distributor caps, rotor arms, ignition leads and as such are a wear item that will get replaced from time to time. I squirted the MAF with cleaner recently, and no change in performance. I also did my wife's X5 and it perked up a little, and its running standard everything, so go figure.

 

I currently have the K&N high flow filter in the air box along with the silicone air intake hose which also closes the air box muffler. So will switching to the pure CAI give me any better results?

 

I very seriously doubt it.

All you would get is more intake sound.

And sorry, I have to disagree with Imola.......Porsche MAF's are very sensitive. Too much oil on a filter can kill one dead.

Mine just croaked on it's own....not oiled filter related.I have been running the Evona V Flow CAI for the past 7+ years, but hadn't cleaned or re-oiled it recently.

 

There are the haves and have nots. Be sure you are getting information from those who actually have the K&N Filter or other intake systems.

What I think it means is don't drive your vehicle for hundreds of miles in a bad storm, through floods, etc. I believe the K&N design is the most open design (probably why it yields more HP) which allows a greater chance of it getting wet. BTW, I though K&N designed a "sock" for harsh weather conditions?

Also, the K&N is sometimes is over oiled, or stored in a way, before shipping, that allows the oil to pool which can cause the excess oil to "dirty" the MAF once installed.

I don't have a K&N I have the EVO version. These types of intakes have been proven to yield 5-10whp on most vehicles. Even Porsche GT3 RS 4.0 uses them.

Send an email to the company to asking what "harsh" means. P.S. my EVO Intake was installed at the dealer along with my GIAC flash.

 

"harsh" is a very bendable term. They probably put it in to limit liability.

The sock for the cone filter is, as fas as I know, for dusty regions to avoid too much sand in the filter. The K&N shouldn't have any problems with rain.

As for the oil issue, yes it can damage your MAF Sensor. But, the mechanics I have talked to tell me it is since some people oil it from the inside after they wash it. Wash it inside out, but only oil it from the outside, and leave the oil some time to sink in and spread before starting the car again, then you should be fine. I had it for quite a while and it's fine.

As for the gains, I doubt they make as much as advertised, but it does increase the throttle response very slightly. I would put it in the category of nice to have, but not necessary.