Yes, it physically fits because the 3/4 share the same body. But the engines, and more importantly the intake system, are totally different. This is why nobody has marketed a snorkel kit of the 4. I still think you'd have to design a cross-over so both sides would be fed by the snorkel but I don't think there's the room to make it breath correctly without doing some serious mods.
(look, I didn't write this on my phone so it actually reads like I wanted it to!)