Kn 33 2399 Panel Air Filter
Air Filter Panel H-1 in. L-4 1/8 in. W-6 5/8 in.
Kn 33 2399 Panel Air Filter Picture
Kn 33 2399 Panel Air Filter Photo
Kn 33 2399 Panel Air Filter Pic
Kn 33 2399 Panel Air Filter Image
Most helpful customer reviews
2 of 2 people found the following review helpful.
 Good product-No Issues, Small Benefit
By Beckster
Ordered two for my Infiniti G37. Installation was a breeze (definitely ensure you have a good seal as you press in). I haven’t seen any vehicle issues (i.e. transmission problems reviewed elsewhere) but also haven’t seen much of a gain in MPG or performance (unlike my lask K&N with a 1mpg boost). I’ll wait to see if my lead foot gets lighter to help it out.
2 of 3 people found the following review helpful.
Easy installation – have not notice a huge difference.
By norm 2004
I have a 2008 G35xs and the installation of these air filters was so easy – I researched it online and the 2003-2006 models required removal of covers, but from 2007 on – the air filters come right out.
I have not noticed any gain in HP, but maybe a little. No problems with the computer like the other user’s review.
0 of 0 people found the following review helpful.
 Might be OK for the G35 but not for the G37
By Tywan James
I have a 2008 G37 with only 8500 miles. These filters sound real good and give the car a turbo charged feeling on the highway but around town it turned the car into a dog. Before I put the filters in I had the oem filters in. I could spin the tires from a dead stop with no problem. With the K&N’s no matter how hard I tried I couldn’t. These caused a noticeable delay in low rpm power delivery. I’m guessing these let so much air in that the computer gets confused and retards the ignition. If you have a G35 these might be fine for you because those engines have more low-end torque than the 37 engines and therefore owners won’t notice the loss of around town power as much. I unfortunately had to return these after about three weeks because I needed my torque back. On the highway though it turned the car into a beast and I got a little bit better gas mileage, I think.
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