K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 2008-2017 KAWASAKI (EX250R Ninja, EX300 Ninja, EX300 Ninja ABS, EX300, Ninja 250R, Z300) KA-2508, Black

Excellent filter, much better acceleration, much better idle, it does sound better too, overall feels like engine is breathing much better. I think you must have this other then the factory filter. I did have K&N filter on my car with V6 engine, but did not notice much difference. On motorcycle - Yes, it does. very easy to install, I put it in just 3 minutes.

Good instructions, and came with tube of grease that was more than enough for the install.

Significant throttle response compared to previous stock filter.

Sounds great

"I ordered this item and it arrived within the expected dates. I haven't installed it in my bike but it came with a K and N decal which was cool, lifetime warranty sticker, installation instructions, sealing grease, and of course the filter. I will give an update on my feelings after installing it. "Update- Air filter works great. I am actually finding top end acceleration on the highway to be a little faster which is good for overtaking. Great product overall.

This is a MUST for your Ninja 250! Wish I had done this from the beginning. I drove 8787 miles before getting one for this bike. I had them for all my other vehicles. This should be the very FIRST thing you get for your bike. I really does feel like it has 50CC more under your legs. Best bang for your buck! Wish I had a dyno to tell you exactly what power increase I got, but all I can say is that it's VERY noticeable. Get one of these to treat your bike's asthma issue! Allow it to take deep breaths!

Nice filter does what it's supposed to do.To those that are saying they've stuck this in their Ninja 300 and gotten a performance boost I have to seriously question their sense of reality. I have not noticed a single gain from using this filter and that's because there isn't one! seriously, an engine can only suck in as much air as it can push out. If you really want any substantial gain from this application you'll need to install a full exhaust system with it and a fuel controller with proper mapping. Without those the only thing you're buying is a washable and reusable filter, which for the money, is still a fantastic deal!

First thing I modified on my 2013 Kawasaki Ninja 300, and it made a huge difference on its performance. You could feel the increase in acceleration compared to when the stock air filter was still installed. I like to open the bike up in first and second gear just to feel the difference from before. Its a great part to change on the bike. Next thing i'm going to modify is a full two brothers exhaust. Aurai!