It will be a knock off, as far as i know the Safari's are still made in Oz. I fitted an Airflow which is also made in Oz not too far from me, $220 delivered and then gave me back $30 for taking some install pics for their website.

 

I agree the interface from airbox to wing assembly is not great. However if you get it right, a pressure test will show it is holding ok. You will want to pressure from the snorkel neck intake with everything closed up, 3 psi is all you need. Test it any other way and you risk overlooking a leak further down, better to do a full system.

Less rain than you think will get in, and it won't hurt anything. It would take a huge amount of rain or even a hose spray to fill that box up to the point where it gets into the filter element and then into the intake manifold. If you have to do a check valve make sure it has a good margin of error, if it gets jammed up with debris (which the safari style will suck up a lot of), you will need to monitor it that is opening and closing correctly. The vehicle I had fitted one to was completely fine with out a box drain. You could always turn the snorkel head around or fit another cap style. Airflow isn't a terrible issue for that motor.

Keep in mind your transfer box and transmission breathers end at the bottom edge of your windshield glass.

 

Update: Snorkel is holding up fine. No fading issues that I can see. I still want to source a better seal for between the snorkel elbow coming out of the body to the air box. Have ideas, just need to find the right part.