Review on Window air inlet Air-box Eco by Momchil Mastur ᠌

I bought for comparison two models Eco and Comfort. It's strange, but Comfort has a seal in the kit, while Eco doesn't. According to purely subjective sensations, after installing the filter, the thrust became less, but I did not put it exactly according to the instructions. I put the filter not on top of the window opposite the valve, but on the side because there was already a cut in the seal from the old standard valve. I didn't want to make more cuts. Filter with very large openings. I don't know if it can even filter out. . small birds?