

♻️ Power, longevity, and eco-consciousness in one sleek filter!
The K&N High-Flow Original Lifetime Engine Air Filter is a premium, washable air filter designed specifically for 2007-2020 Infiniti and Nissan models. It increases engine airflow by up to 50%, enhancing horsepower and acceleration while improving fuel efficiency. Engineered with four layers of cotton gauze and durable construction, it offers lifetime use with cleaning intervals every 75,000 miles. Easy to install and backed by a limited lifetime warranty, this eco-friendly filter reduces waste by replacing multiple disposable filters over your vehicle’s lifespan.





| ASIN | B001C4SL04 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #40,038 in Automotive ( See Top 100 in Automotive ) #545 in Automotive Replacement Air Filters |
| Brand | K&N |
| Customer Reviews | 4.6 4.6 out of 5 stars (665) |
| Date First Available | February 13, 2005 |
| Exterior | Machined |
| Global Trade Identification Number | 00024844199782 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.2 ounces |
| Item model number | 33-2399 |
| Manufacturer | K&N Engineering |
| Manufacturer Part Number | 33-2399 |
| Model | High-Flow Engine Air Filter |
| OEM Part Number | 16545JK20A, 16546JK20A, 1654LK20A, 71743887, AY120NS050 |
| Product Dimensions | 3.94"L x 3.07"W x 0.71"H |
| Safety Rating | Não aplicável |
| UPC | 024844199782 |
A**I
slight performance increase
had it for a week and i already have improved gas mileage and the engine is breathing better. keep in mind this only includes one filter so you’d have to order another one for the VQ37VHR. perfect oem fitment and amazing quality.
W**D
K&N is the best and only air filter you will ever need on any engine.
I have had K&N in every car that I have owned. The best air cleaner out there. I have always liked how you can clean them let dry,re-oil and install back into the car. the cleaning kit is not too bad on price and you can find it at any auto store. Hold any air cleaner up to a light and look through it next to a K&N and you will see the difference! Its plan as day. Very easy to install on my new to me 2010 Infiniti g37 sedan. I had them both installed with warning stickers in less then 5 min. Worth the up front cost because i will never have to buy another air filter for this car again. My last daily driver has 250,000 miles on it. That car I,m passing down to my son. It still has the K&N air filter on it that I installed when it was new.That K&N air filter looks like new after I cleaned it,re-oiled and installed. I'm 42 now and will have this product in every car that I every own until I'm gone.
N**T
Bought for a 2007 350Z, HR.
Great and awesome! Very tight fit so just be careful installing! The packaging and website tells you, you can wash these and rinse the filters for reusability! Worth the price for my Z to breathe!
J**N
Real mpg gains, wash and repeat
After keeping track of my mpg for almost 10k miles on the K&N filters, I can honestly say they performed better than I was anticipating. I do 50% of my driving on busy but flowing country roads 55-65 mph with few to no complete stops. 35% congested City, and 15% highway. I'm averaging 1.9 mpg better with these filters installed. I can't speak to any horse power gains as I haven't put the car on a Dyno. Sometimes I think it might be a little peppier, most of the time I'm not sure.
J**O
Tight fit
K&N is a quality product. But definitely a tight fit for the G37! Push on the latches to get it to hook onto the airbox.
C**R
A difference you could feel... improved acceleration at lower RPMS.
I put these in a 2009 G37x which requires two filters so be sure you're buying two if needed. Anyways at certain lower RPMs the car felt a little sluggish so I decided to check out the filters & they were cheap restrictive looking filters so I bought K&N put them in & went for a drive and I could feel the difference in acceleration and "get up" in the lower RPM range the throttle response improved I was actually surprised. They look much better quality & I could see how the air flow will improve just by comparing this filter to the one I got with the car. I would recommend, it's worth the money in the long run. Eventually I'll get a cold air intake but meanwhile this will do lol
P**R
Great product that saves you money
I got this for my Infinity G37S and wanted a easy install and great product that was way cheaper than the dealer and that is exactly what i got. I can say I was able to install on myself and it saved me a lot of money compared to dealer and it increased my gas mileage. Arrived quickly and in great condition...will definitely use this vendor again.
S**R
Clean Filter Housing Too
I've had K&N filters on virtually all of my cars & motorcycles for many years & am more than satisfied. Gas mileage & power seem improved, but money saved is equally important.
M**E
Got those for a 2015 370z car is stock as if new from mechanics point of view. After 6 to 8 weeks the car turned to have a huge acceleration lag and I believe the MAF’s need to be either cleaned or replaced. I would recommend to think 20 times before you jump into flushing OEM’s parts into good marketing after market ones.. Not happy with the results at all
R**Z
Top
H**6
No real difference in induction noise on the 370Z. However as these last the lifetime of my car I will save not putting cheap over priced ones at service intervals. Plus added bonus of engine bay bling K&N stickers. =)
S**D
Great quality! The K&N filter fits perfectly on Infiniti G25 and improves airflow and throttle response. Love it!
R**E
Fait bien le travail