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I just got mine for the Terrain the other day from K&N online store .... haven't installed yet, waiting for break-in period to expire .... less than $50 plus tax .... they have them for both the 2.4 and 3.0 engines...
 

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Be very careful when you re-oil a K&N air filter. If you over-oil it, oil can get on the mass air flow sensor (wire) and cause issues. I've read this on several other forums. In my opinion, the K&N is not worth it. I used it on my pickup truck before and didn't notice a difference. What it did notice is oil in the air intake - not good! And this was from a new K&N. Also, I've read where several dealerships actually denied claims when they found that the owners used a K&N air filter.
 

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I've seen that info mentioned on other posts, but I've using them with success for many years on many vehicles...so I guess it is buyer beware...
 

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Bad Dave said:
I've seen that info mentioned on other posts, but I've using them with success for many years on many vehicles...so I guess it is buyer beware...
K&N=bad filters imo... You gain more power fixing piping issues then you do just doing a drop-in filter. Plus the amount of dirt that k&n allows in once the oil is dirty is crazy. Check out this filter test, in which K&N cried foul lol

http://www.bobistheoilguy.com/cms/index.php?option=com_content&view=article&id=58&Itemid=66

Gain is really small...Dirt allowed in much larger. If your going to go with a performance filter...GO LARGE and do not waste your time doing a simple drop in that gains less then 1whp, if not cost you whp. Going to a larger filter element (cone filters come to mind) or a larger air box assly with larger filter is where gains are, drop-in's are just a simple waste of 50.00, unless you do not mind the dirt, and wish to clean your filter vs replace it, read up on them on the forum above on the UOA's that have K&N filters installed, lots of "foreign" materials in the used oil, which goes with the K&N being a poor excuse for a filter. I would not install one on any direct injected engine personally since the engine by design does not clean the intake runners or valves.
 

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gig229 said:
Be very careful when you re-oil a K&N air filter. If you over-oil it, oil can get on the mass air flow sensor (wire) and cause issues. I've read this on several other forums. In my opinion, the K&N is not worth it. I used it on my pickup truck before and didn't notice a difference. What it did notice is oil in the air intake - not good! And this was from a new K&N. Also, I've read where several dealerships actually denied claims when they found that the owners used a K&N air filter.
GM has TSB's that if you a K&N air filter and the MAF goes bad they will not cover under warranty
 

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K&N doesn't work to well with MAF. it killed my 2000 Trans AM. After installation of the filter it COMPLETELY screwed my MAF. Took me forever to figure it out cause i had just replaced the Heads on the engine and a few other things along with it. Once i replaced the MAF with a new one, perfect again.
 

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if your keeping the stock airbox, just stay with stock filters...never been a fan oiled filters.....washables are the way to go.....but they dont make many panel washables......
 

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Yeah, I'm with the others who prefer to stay stock with the airfilters.....who do you trust to really know whats best: the engineers who designed the engine or an aftermarket company who may or may not have done extensive testing with your exact engine? I'm not saying that aftermarket parts can't be high quality, (or higher quality than OEM) but higher quality doesn't always mean that it will work better. Personally I would wait until the powertrain warranty is up before playing around under the hood with performance airfilters, cold air intakes, ECM reprogramming, turbos, etc..
 

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Im bringing this back from the dead because I just ordered an K&N drop in. I have read horror stories (including on here) but I have run them for years without issue. If you have MAF issues then you just remove it and clean with Carb cleaner, it will take off the excess oil from the sensor without damaging it. Otherwise, you need to clean the filter regularly, i do it every other oil change.

Im not getting this for HP increase as this car isnt a race car. It is solely to help MPG and peace of mind as I trust K&N over delco.

On my 2001 Camaro i saw minimal HP increases (1 or 2 at the wheels) but I got about 3 mpg increase consistently. it never messed up my maf in that car, but i cleaned the maf whenever i cleaned the filter. its good practice anyways.
 

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Dave25 said:
Im not getting this for HP increase as this car isnt a race car. It is solely to help MPG and peace of mind as I trust K&N over delco.
Just because I'm curious - what kind of catastrophic failure could occur because I trusted delco?
 

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It wouldnt be a catastrophic failure, its more about airflow. the K&N will allow more air flow.

I do have to say though, when it comes to oil filters I prefer Delco.
 

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Dave25 said:
Im bringing this back from the dead because I just ordered an K&N drop in. I have read horror stories (including on here) but I have run them for years without issue. If you have MAF issues then you just remove it and clean with Carb cleaner, it will take off the excess oil from the sensor without damaging it. Otherwise, you need to clean the filter regularly, i do it every other oil change.

Im not getting this for HP increase as this car isnt a race car. It is solely to help MPG and peace of mind as I trust K&N over delco.

On my 2001 Camaro i saw minimal HP increases (1 or 2 at the wheels) but I got about 3 mpg increase consistently. it never messed up my maf in that car, but i cleaned the maf whenever i cleaned the filter. its good practice anyways.
I agree with Dave. I have consistantly seen MPG improvement (with minor HP increase) with every vehicle I have owned. I use them in everything I own, from race cars to ATV to the Equinox. The key is to follow directions carefully. Yes over oiling can do potential damage, but also never consistantly maintaining or changing a "standard" air filter can also cause potential motor problems / poor performance.
 

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you dont need a K&N to get better mpg...you just need a freer flowing filter then stock....whether its an air hog, or other brand....

my past vehicles (since my venture with $$$ k&N) i always get a washable element filter...easiest t clean and also much cheaper then k&n.....
 
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