K&N 33-2399 Panel Air Filter

[The General]

Any of you guys (or gals) using this air filter? I've read a few reviews online that say the 3.7L engine runs pretty rough with one installed.

I had a K&N in my '04 Acura TL for over 70k miles and never had an issue (in fact, the car got about 2 mpg more with it)...but not all cars are the same.

Thanks!

[G_whizz]

I have yet to hear of anyone here using that filter. Most go with the Stillen or Fujita.

[G37 Man]

Any of you guys (or gals) using this air filter? I've read a few reviews online that say the 3.7L engine runs pretty rough with one installed.

I had a K&N in my '04 Acura TL for over 70k miles and never had an issue (in fact, the car got about 2 mpg more with it)...but not all cars are the same.

Thanks!

I have been running the K&N air filters in my 2008 G37s since I first got it.I havenot noticed any problem and in fact just cleaned them at 15k miles and they didnot look that dirty.

[The General]

OK, thanks!

I will also look into those others mentioned.

[The General]

Are these brands that you mention for CAI filter replacement or drop-in?

[G_whizz]

They're not drop in and they're not considered CAI either as they stay within the engine department. I think Fujitas have a heat shield and the Stillen has the box.

I order my stuff from this site sponsor and always ask for Joe as he is great to deal with.

Here they are (pictured after the drop ins)

http://www.g35parts.com/Infini...1.htm

[The General]

Ah

They're not drop in and they're not considered CAI either as they stay within the engine department. I think Fujitas have a heat shield and the Stillen has the box.

I order my stuff from this site sponsor and always ask for Joe as he is great to deal with.

Here they are (pictured after the drop ins)

http://www.g35parts.com/Infini...1.htm

Ah...Thanks! Well, I'm not looking to spend lots money on performance parts right now (and I'm not much of a "tuner"). What I've liked about the K&N drop-ins is that they usually give a little bit better gas mileage and they can be cleaned, allowing them to last for 50k miles or so. And they only cost about $50.

[tollboothwilley]

Stillen has a CAI that goes in front of the radiator. You actually have to put holes in the radiator support for the intake tubing. It has proven to be the best intake for the G37 out right now.

[G37 Man]

Putting Stillen or Fujita into the G37,what impact does that have on the 4/60 warranty you get with the car?

[G_whizz]

Unless a problem occurs that is directly related to the MOD, it shouldn't affect anything.

eg.. if your power seat stops working, they can't place blame on the filters.

[G37 Man]

Unless a problem occurs that is directly related to the MOD, it shouldn't affect anything.

eg.. if your power seat stops working, they can't place blame on the filters.

I understand,but if you have an engine malfunction can they tie it into the useof the MOD?

[Sentientbydesign]

I understand,but if you have an engine malfunction can they tie it into the useof the MOD?

These intakes are very well designed and I haven't heard of any denied warrany claims because of them. HOWEVER, I would steer clear of the K&N or ANY cotton gauze filter as the design is far from optimum. I've read quite a few informal tests and antidotal evidence and the reoccuring issue is that the cotton gauze filters have very poor filtering abilities until they've gotten a little dirty (the holes in the filter get partially blocked). Then once the filtering gets better, the performance aspect dies off and they don't flow any better than a paper filter.

There are a few synthetic filters on the market that seem promising, but do your research. I've seen some bizarre "results" from informal testing that didn't seem expected.

[RobTurbo]

The 2008 G37S Dual Intake System is Fujita's latest release10.03 WHP Peak Gain, and 9.08 FT/LBS Peak TQ Gain.

Has anyone put there car on the dyno before and after installing this intake? Seems highly irregular to me that it would add 10WHP and 9Ft/Lbs? If its true thats awesome but seems strange?

[SVTCOBRA]

Any of you guys (or gals) using this air filter? I've read a few reviews online that say the 3.7L engine runs pretty rough with one installed.

I had a K&N in my '04 Acura TL for over 70k miles and never had an issue (in fact, the car got about 2 mpg more with it)...but not all cars are the same.

Thanks!

I put a drop-in K&N in my wife's 05 G35 Sedan.The only thing I noticed was a decrease in MPG.Had gotten better MPG with other vehicles.Contacted K&N and they said that they only advertise increase in performance not MPG.

I now run NAPA air filters ($5) made by WIX plus Z-tubes.