K&N High-Flow Original Lifetime Engine Air Filter: Increase Power: Compatible with 2004-2021 Nissan/Infiniti: Pathfinder, Frontier, NV1500, NV2500, NV3500, Armada, Titan, Xterra, QX56, 33-2286

I replaced my a8 yr old K&N , I tried to clean it years ago with simple green and it eventually fell apart, now I only use the recharger kit. I replaced the old falling apart K&N last year with stock paper filter, the paper filter does not flow air like the K&N, Acceleration has improved since replacing the paper with K&N

I've used these in many vehicles, and they are very, very good, both in action and cost efficiency. Yes, you do have to service them every 50k, but you're not just buying one after another air filters every 20 or so thousand miles.The deal went simply and quickly, and I am very happy to have yet another vehicle equipped with one of the K&N air filters.

I have another vehicle that has a K & N filter which has worked out very well. I have the cleaner and oil for these filters already. It helps with performance and slightly with fuel economy.

I put this filter in my 2010 Infiniti QX56 and noticed an immediate gain in acceleration. My old filter was dirty but not plugged by any means, which indicates that the K&N filter does, in fact, flow more air.I've known about and used K&N filters since I was a young snot. Had them on a pair of Weber 48IDA carbs on my VW Karmen Ghia and my Micro Bus. Loved them then and love them now!Pros:Easy installNo more filters in the trashBetter air flow to my gas guzzling V8Came with a couple of stickers, One for your car or window or whatever and one for the filter housing to remind your local lube shop not to toss your filter in the trash.Cons:Box was a bit oily as the plastic wrapper on the pre-oiled filter had a hole in itAnticipate a drop in fuel economy due to my foot-on-the-floor all the time nowNo other cons

Not so sure it will get me any more mpg's the weather has turned bitter cold and milage has tanked for nowwill continue to check but until it gets back to the 40's I won't know for sure

Easy to install, clean and reinstall. Last air filter I’ll ever have to buy. Seems like I grabbed an extra 2 mpg on ‘13 Nissan Xterra

I have seen a 2 MPG increase. I have a 2011 Titian and was getting 13 MPG and now get 15 MPG. I don't race my engine so I can not tell you about performance. I am happy with the increase on MPG. very easy to install.

I will update this review when I get more miles under the belt and have to clean the filter but so far so good, throttle response is a little quicker, mileage actually went up 1-2 mpg and a little growl to intake when I put my foot in it over a paper filter.