Fast delivery
I ordered a K&N furnace filter on 2-4-22 at 9:30 a.m. and it arrived on 2-5-22 at 10 a.m., in Connecticut via FEDEX. Very fast delivery.
By JohnD
Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
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75 reviews
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For over 50 years, K&N® has been an industry-leader in automotive filtration and technology—offering products to increase performance, protection, and longevity in thousands of vehicle applications for consumers worldwide. K&N offers replacement air filters, air intakes, oil filters, cabin filters and more, factory-direct from knfilters.com, the official site for K&N performance filtration products.
K&N (knfilters.com) has 75 customer reviews on The Fair Hearing, with an average rating of 1.8 out of 5.
Showing 13 reviews with 5 stars · Clear filters
I ordered a K&N furnace filter on 2-4-22 at 9:30 a.m. and it arrived on 2-5-22 at 10 a.m., in Connecticut via FEDEX. Very fast delivery.
By JohnD
Purchased a filter on-line from a 'stockist', arrived without the frame to secure in the filter housing. Supplier didn't have another in stock, so contacted K&N UK by email explaining the issue and if I could buy the frame alone. Response within minutes with offer to provide required frame without charge, even though it was not their problem. Arrived within 48 hrs of being informed; great service. Product....have always fitted to EFI vehicles, especially if planning a re-map...6 bikes, 2 vans and 3 cars !
By Brian W.
Just replaced my filter in my 2019 Eco boost premium Mustang. Have had the same filter in my hemi Grand Cherokee. The Mustang runs much smoother and is much more responsive. The lifelong filter has worked for me for over 20 years, well worth the investment.
By Bob B.
I recently purchased a K&N cold air intake for my 2006 350z. The installation was easy and quick. Unlike many other after market parts, this cold air intake fit without any addition modifications. It was simply a bolt on and go fitment was perfect and it looks awesome.
By Tim D.
My 5th purchase from K&N. This is the only brand I use for air filters. Easy to find the correct filter on their website and delivery was very quick. As always the filter itself was high quality and easy to fit.
By Kev