Improved fuel efficiency?

Mounting parts
Intake suction kit
Impression
I drive at a pace of 15,000km per year, and I feel like the torque has increased compared to before the installation.
On smooth roads with no traffic lights, I can easily get over 20km per liter.
I can't go back to the original anymore.
Hokkaido Red water-based pen
Vehicle model: CX-30 Model: DM8P Grade: Retro Sports Edition