An invisible but visible effect

Mounting parts
Air filter replacement
Impression
I want to improve the intake effect! Will it improve? I was conflicted. If the case was transparent and obvious, I would have been happy, but it is a part that is completely hidden, so I replaced it with a feeling of regret... After that, I felt that the car became slightly lighter, especially the acceleration in the mid-speed range improved.
Tokyo GranTu
Car model: Demio Model: DY3W Grade: Casual