I actually switched back from a short ram to the stock airbox recently and it completely changed how the car drives — smoother powerband, better MPG, and way better throttle response. I do miss the VTEC sound a little, but performance > noise for me.
The OEM air filters for my 2020 LX are super well made and atleast locally in Canada I havn't found a better option.
Mahle is decent i believe they are OEM supplier for BMW and alot Europe vehicle as compared to Acdelco for GM and domestic vehicles not talking filters just in general there.
I'd just go with the K&N as you seem to want the best bargain for the $. These K&N filters are very good and will be the last time you buy a air filter. Simply next time you need to replace what I do is spay clean through both side with a garden hose. Air dry, spray a lil oil on it "k&n" re-oil. The oil is what collects the dust. And reinstall back in the car. Plus there proven to add 1 or 2 HP.
I actually use one in my 21 Civic type R, recently cleaned and reinstalled for the 3rd time.
I use Fram Extra Guard in my 2014 Civic and have used Fram for decades in my cars. Never had a problem.
WIX been using mine for 12,000miles on my 2019 Honda Civic EX and MPH went from 23 average to 30.5 average this is after 9 months on using the same filter. I’m gonna replace it with another WIX filter today. Last a lot longer than the OEM filter and kept my car more quiet as well
I change the one in my Civic about once a year, probably should do it more often though.
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