K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance, Premium, Washable: Flange Diameter: 2.5 In, Filter Height: 4 In, Flange Length: 1 In, Shape: Round, RB-0700

Arrived on time. Great price!

Very good looking filter!

Knocking a star off of my rating because the flange on the actual filter has a 5-degree angle. The pictures show a straight centered flange with no angle. It worked for my application, but may cause issues for someone expecting a centered flange. I bought this for my 2026 Harley-Davidson Nightster. At this time there's not a vehicle-specific K&N filter for my bike so I went with the measurements of this universal filter. The inlet is slightly loose and required a good amount of tightening on the clamp compared to the stock filter, but that is the only issue I encountered. I have been using K&N filters for the last 20+ years they are the best, I think they are worth the investment. I assume this one will be no different but I will been checking the fitment periodically on my bike just to make sure it doesn't come loose, etc. I'm not expecting major performance gains or anything from the filter alone, mainly purchased for the reliability and longevity I come to expect from this brand.

It's a K&N product. What else needs to be said. It does the job as advertised. Try it you wont be disappointed.

When i first opened this it looked like a k&n but after a week it was turning white/pink, ive never had to oil a k&n filter that soon. The rubber for sliding over the intake tube was also a little short, like another 3/16” of rubber added to the end and it would be solid, maybe its meant for straight intake tubes and not ones with a bevel on the lip, but the bevel keeps the air filter from slipping off easily in most cases, especially with an oily air-filter. If this thing starts to deteriorate in the next few months i’ll update. Which means my motor will have eaten the filter particles that fell off and probably not done my cylinders any favors. Time will tell.