2019/10/5　I was impressed!

I bought 3 of these for my 4400cc engine.
I put them on the outside of the filter for fear that they would come off. I felt the smoothness and the lightness of the air.
However, in the second picture, the part I put on top was hidden when I put the filter back.
I got the confirmation that there was no problems, but it looks good so I bought another one to install. 
I feel like it blows up lighter and goes on smoothly and quietly.
My previous car was a 4400cc car with the Ram Air system and it feels as good as that one.
For the price of this car, it feels great.
I think there is a synergistic effect of the sports filter and 4 protruding mufflers.
The manufacturer's response and explanation of the product was very good and satisfactory.

2020/8/7　Buy 2

This car is a BMW 320i.
I put two of them in the box.
My impression of driving in ECO mode is that when I stepped on the accelerator at a traffic light, I felt like I was in the wrong place.
When I step on the gas pedal as much as before, it moves forward with more force than before I put it up!
Now we just have to hope for better gas mileage!

2020/12/10 First report

The car is a Mazda Flair Wagon (OEM car of Suzuki Spacia) registered in March 2018, and is a light car with a current running speed of 50,000 km.I feel that the torque has increased in the experience part. Is it a feeling that the car goes out in front with less stepping than before? I felt it when I was riding in the city before a business trip, but I felt it stronger when driving at high speed. The fuel consumption on the outbound route was almost the same as 22km / l, but in fact, the travel time to Osaka has been shortened by more than 30 minutes. In other words, I was driving at an average speed of about 10km / h higher than before. Since it is a box-shaped car, the fuel efficiency was extremely poor when driving at about 100 m / h or higher, so I think that the fuel efficiency part was also effective.

2020/10/18 Fuel economy has improved

It is a verification with RG1 of Step WGN that runs over 200,000 km. I think it will change depending on how you drive and the presence or absence of traffic lights, but the old fuel consumption was 10.5-11.0 km, but now it is 12.2 km. Since it is an in-vehicle fuel consumption meter display, it is just a guide, but I was happy because the mileage exceeded 600 km from the full tank to the next refueling, so I ordered additional parts for light cars and motorcycles.

2021/2/7 　I put it in secret

I put it on my wife's car in secret.Two weeks after I put it on, my wife muttered, "The car is in good shape recently."She shouldn't know what I put on ...It may be effective.