K&N Install
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snowbrdr033
New member
I'm interested to find out how you like it over the next couple of weeks. I've been debating whether or not to install one, if it's truly worth the price for the added "intake noise" and if it helps anything at all.
Does the K&N only offer the "wet" filter for the CAIs? I want to find one without an oiled filter.
Does the K&N only offer the "wet" filter for the CAIs? I want to find one without an oiled filter.
snowbrdr033
New member
So it sounds like the only option for the K&N CAI is a wet filter, right? Did it come with a wet or pre-oiled filter? Thanks for the help!
I've had my K&N for about 7 years. Sounds better, but not much improvement with mileage or power imo. As far as fouling my MAF, hasn't happened yet. I do let the filter dry for a hour or two before running the motor. One thing I had to do was add a piece of 1/8 thick piece of rubber, cut out to fit under the filter to eliminate the tapping noise of the chrome cap on the filter bouncing off the mounting bolt directly under it. The rubber on the filter will breakdown/weaken and allow the filter to bounce a bit. It actually sounded like a loose shock when it first started on my runner. Other than that I'm pretty happy with the CAI.
TRDSmokedU
New member
I am looking to buy a CAI for the V8. Please keep us updated with your experiences. Do you feel an increae in power?
Veritas
New member
I love it, but yes when you gun it it absolutely sounds MUCH louder for obvious reasons. look at the giant hunk of plastic you took off, it is a giant baffle system which was designed to cut down on noise, which then cuts down on airflow. You replaced that with a straight pipe with no baffle system so you get more air, more power, and better MPG. But it WILL be louder, only when you gun it though, not in normal city driving conditions, just at or above about 4,000rpms.
I love mine, but I do understand how some people would dislike the sound. It can be loud...
I love mine, but I do understand how some people would dislike the sound. It can be loud...
Veritas
New member
No I am pretty sure it was a bazillion...:nerd:
I see you are still BS'ing your way around the forum...LOLOL
To the OP,
You should gain right around 13hp on a V8: http://www.knfilters.com/news/news.aspx?id=468
On a v6 you gain about 9hp: http://www.knfilters.com/search/product.aspx?Prod=63-9023
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B
BReardon21
Guest
I haven't done the full CAI, but i did do the K&N drop in filter. I also removed the filter in the top portion of the airbox. I have noticed a difference in the sound of the engine as well as smoother shifts when acelerating. I don't know if it really has changed anything regarding MPG's (may have gove down, cuz I love the sounds and in turn give it more gas) :guitar3:
If you decide you are too old and take it out PM me, may be willing to take it off your hands. :hungry:
Looks good!
If you decide you are too old and take it out PM me, may be willing to take it off your hands. :hungry:
Looks good!
I guess I've decided I'm too old 
For Sale thread here: http://www.toyota-4runner.org/sale-t4r-items/103365-k-n-air-intake-kit-v8-4-7l.html#post923529
For Sale thread here: http://www.toyota-4runner.org/sale-t4r-items/103365-k-n-air-intake-kit-v8-4-7l.html#post923529
Desert Fox
New member
I installed a complete K&N kit in my Nissan Frontier. Along with several other MPG increasing mods. My hiway milage went from 22 to 26 MPG. That was after several mods not just the filter.
My in town milage did not change.
What you will find with most of the MPG improving modifications is it has an impact on mid range performance more than low range.
I put over 50,000 miles on the filter, cleaning it 4 times and never had an issue with the MAF.
There is a noise increase.
On my 4Runner I installed a K&N filter not the complete intake kit. I like the stock box over the K&N box so I am using it.
There is a increase in noise from the filter but it is not bad.
My in town milage did not change.
What you will find with most of the MPG improving modifications is it has an impact on mid range performance more than low range.
I put over 50,000 miles on the filter, cleaning it 4 times and never had an issue with the MAF.
There is a noise increase.
On my 4Runner I installed a K&N filter not the complete intake kit. I like the stock box over the K&N box so I am using it.
There is a increase in noise from the filter but it is not bad.
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my butt dyno says it is more powerful Not sure what the objective differences really is. K&N includes some dyno charts. It is definitely louder and meaner sounding. 
arty:
Not sure what the objective differences really is. K&N includes some dyno charts. It is definitely louder and meaner sounding. arty:
natevans65
New member
I have both the dry and oiled filter for the CAI along with a TBS and no issues with the MAF. I do have MAF cleaning spray and do clean it around every 5K miles along with the filter swap. LOTs of air coming in with it able to escape out the Magnaflow exhaust! Makes sense to me....get all that box crap out of the engine bay and allow the engine to breath better with an open filter system IMHO.
snowbrdr033
New member
Question: It appears that the stock air box is attached to the fender and into the wheel-well, does it take "cooler air" from the wheel well rather than from inside the engine compartment?
On mine, it appears like there is a connection from the airbox into the wheel well.
On mine, it appears like there is a connection from the airbox into the wheel well.
03_4x4Runner
Senior Member
I have had problems with kn filters contaminating the maf sensor in the past and will not use them anymore. To those that say they do not have a problem it is a very gradual build up on the sensor and is not noticable untill you put in a new sensor. Then it is like I can not beleive how good this thing runs now.
Ilovesnow
New member
I have used K&N air filters (drop in) in all of my vehicles, for many years, and have never had a problem with it "fouling up" my MAF sensor.
Once a year, in the summer, I do clean the MAF sensor in each of my vehicles (you can buy MAF sensor cleaner pretty cheap). It is easy to do and doesn't take more than a few minutes of your time.
If you clean the air filter properly using the instructions provided in the kit, you shouldn't have any issues. When I clean my air filter, I only oil the "dirty" side of the filter, i.e. the side that the air flows into, and then let the filter sit for a day or so to allow the oil to soak into the pleats.
Just my $0.02.
Once a year, in the summer, I do clean the MAF sensor in each of my vehicles (you can buy MAF sensor cleaner pretty cheap). It is easy to do and doesn't take more than a few minutes of your time.
If you clean the air filter properly using the instructions provided in the kit, you shouldn't have any issues. When I clean my air filter, I only oil the "dirty" side of the filter, i.e. the side that the air flows into, and then let the filter sit for a day or so to allow the oil to soak into the pleats.
Just my $0.02.
