$57.99 USD
MSRP $89.29 35.1% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N 33-2399 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   30 Customer Reviews
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
The K&N 33-2399 Air Filter fits some Fiat Sedici, Infiniti EX35, Infiniti EX37, Infiniti G25, Infiniti G35, Infiniti G37, Infiniti Q60, Infiniti QX50, Nissan 350Z, Nissan 370Z, and Suzuki SX4 models. See vehicle applications link for details.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.61 oz (18 ml)
Height1 in (25 mm)
Outside Length7.125 in (181 mm)
Outside Width6.625 in (168 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height9.69 in (246 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight0.9 lb (0.4 kg)

K&N 33-2399 Air Filter Product Reviews

Tuesday, March 21, 2017 - Part 33-2399
As always the filters fit perfectly in my 2015 370Z filter trays. Better acceleration and an extra mile to the gallon.

William Tighe
Sumner, Washington
Friday, March 10, 2017 - Part 33-2399
Fast and efficient ordering process. Easily removed the two original paper air filters from my 2014 Infiniti Q60s, and installed the K&N Replacement Air filters.

Shlomi Gudai
Plantation, Florida
Wednesday, January 18, 2017 - Part 33-2399
Installed 2 of these on my 2013 Infiniti G37. The car is noticeably quicker with no hesitation when you mash on the gas pedal. I've also noticed an uptick in gas mileage. Time will tell if this was a good purchase, but I'm pleased so far....

Scott Mayer
Mount Juliet, Tennessee
Tuesday, January 17, 2017 - Part 33-2399
The air filter arrived on time. It was easy to install. I seem to notice some additional engine power. Hopefully my gas mileage will also improve. I had not changed the original air filters since I bought the car, approximately 64,000 miles.

Jeffrey Rothenberg
Dunwoody, Georgia
Thursday, September 8, 2016 - Part 33-2399
Ordered and received as requested. Thank you.

Scott L Laboda
New Hope, Iowa
Sunday, August 21, 2016 - Part 33-2399
Fast shipping and the lowest price. Very satisfied with the filters. Perfect fit and gives my G37 a little more power and improved mpg.

Dino Rizzi
Terrebonne, Canada
Wednesday, August 10, 2016 - Part 33-2399
Awsome fit and fast shipping.

Ismail Awan
Thornhill, Canada