Originally Posted by Velocity26
If he sealed the box to take advantage of the "ram air" effect of the stock snorkel, that would only appear at speed, where you could have ram air.
I also wonder if the box comes without a full seal due to the ram air effect. If ram pressure exceeds what the engine can take in, the gaps we see could be there to allow the pressure to dissipate. It will be interesting to see if the seal that has been added stays intact after a high speed test run in Mexico.