K&NCold Air Intake System: High-Flow Air Filter, Increase Performance & Acceleration: Compatible with 2016-2021 HONDA: Civic, 63-3516

I’ve only ever heard good things about this air intake & it precedes its reputation! I originally only hair a muffler & resonator delete so my car was already loud. Without saying this made the sound better and the performance is better. The quality is good, the price is great compared to other, and it adds some color under the hood. It was a also a quick installation and fits perfectly fine.

Drastically improved acceleration on my 2017 Civic Sport. I have the CVT transmission and it still sounds great especially when doing a small pull off a stop light or something. Great growl sound and big whoosh when you let off the throttle at about 4000-5000 rpm’s

The media could not be loaded. Easy install. I did it with simple hand-tools and it took me about an hour and a half to install by myself. I never installed any intake before, so I’d say it’s super easy. The hardest part was literally taking off one bolt that held the old intake down, but it would’ve been easier if I had a longer ratchet extension. The motor looks cooler, sounds insanely better, and performs better. I instantly noticed the turbo is able to deliver boost a lot faster, almost instantly. Also the gas mileage is even better. This is a win-win upgrade.

Mine came with a pipe full of plastic shavings and could had seriously damaged my engine if I hadn’t checked. Didn’t even notice until I nearly had it on.

Does everything Id expect a high end CAI to do. Install was simple enough, worst part would be needing an extension to get to the 2 bolts for removing the old airbox.MAKE SURE to disconnect the negative battery terminal for a bit, this way the ECU needs to relearn and adjust to this or it'll throw codes.Driving definitively feels snappier on the throttle, power is there, and after week of driving my average MPG of 33-35 went to around 37-38. Could just be old filter was a bit dirty too when I saw it after.The sound is pretty great, could barley hear the turbo before, but now opening up the throttle it is loud and apparent. More of throaty motor noise too.As for value, its up to you if 10-12 hp/torque/better mpg is worth $300 to you.

Although I though that K&N was overcharging for this intake, it does everything a performance intake system is supposed to do. Better engine sound, you can hear the turbo, it increases acceleration (You will feel a difference!), and will eventually provide even better full economy (when you're not mashing the gas). Some people say that these do nothing for fuel economy, that is false. This is my 4th K&N intake system and the first three I have found that it takes about 500 miles for the computer to accurately state the MPG. Don't expect anything major, probably 1 or 2 mpg.Update 9/7/2020:After moving to Florida I noticed the intake began to heat soak when as my IAT's were above what the stock airbox was. I quickly realized that this intake had zero benefit in hot weather and I decided to sell it. Still enjoyed the intake and would've kept it if I was still in Indiana but living in Florida I will be buying the 27Won Hybrid CAI to lower my IAT's.

Not so good parts looked used and the filter adapter didn’t fit at all through the heat shield or on the filter upset sence I can’t intall it

I didnt get a mass airflow adapter to my 2018 civic sport. Everything else came as expected. But I cant run the intake without that piece.