I miss the air intake sound... is there one?

If you look at the location of the filter I can't see how it will get any cold air, which is the only way to really increase performance.

A less dense filter will let more air in, but also the crud (moreso in hot arid/dusty climates which I imagine Israel has ), so may affect any warranty.

If you can fit a Cold Air Induction (CAI) system you can (on a powerful engine) get as much as double figure BHP increases, but on a little engine a replacement filter may give you a max 2BHP, just change the stock filter every 5k miles to ensure it's doing it's best job

In the case of my Jag I fitted a BMC carbon dynamic filter which gave me 7xBHP, higher lift CAMS 8xBHP, weirdly changing oil to Royal Purple a free flowing exhaust (with CAT bypasses) gave me +12 BHP, so it was running 25 BHP above stock. Since it was already running 290 that raised it to 315. Then I had it remapped (both petrol and LPG ECU's) which took it to 328...all of the above were dyno'd as have a friend nearby with a rolling road.

But if you look at the 38BHP increase it is a 12% increase on a 4l V8 for a £4k spend, and yes I can feel it and it has a lovely throaty roar/rumble. If you then look at the CHR with 130BHP 12% would be just 145BHP

I'd personally look at one of those exhaust amplifiers as don't think you'll get any intake sound or exhaust roar otherwise!