ok now no booing :-) lol !, i had that snorkel fitted on a toyota the vibration was due to the huge induction of air and turning the ram around or running an oil bath type did not stop it from vibrating and it was loud ,no names hehe ! but it was a safari brand , but i was told by others with the same 4wd and different snorkels that theirs did it too on certain models i was just looking at alternates before cutting the holes in my guard , i havent heard of a patrol doing it but dont want to find out the hard way . at the momentmy patrol is in perfect order and would hate to ruin it .