Please wait until he replies, I believe he has experience with the drop-in filter.

I am currently using k&n drop in filter but mine is manual gearbox. I would say is a good upgrade as it gives u better low to mid range response after replacing it. I've replace my alza and gf myvi auto with k&n filter, both giving better low to mid range response.
If you're Kenari is not aerosport model, then you will need to purchase the additional spoiler as well to make the fitting look good as move aerodown/peanut is connected from spoiler.

Hi， if you looking a K&N filter and don't mind a used unit...
I have one unit for Kenari and confirm is original from K&N USA.
My friend selling off his car and remove for sell.

Convert step by step, you will feel what is 'Fun'. I had use a lot money and time to complete my car. Hmm..... Nowdays, im feel a bit boring. Hope other kenari owner can make me back 'feeling'. No wonder im keep asking TT session.