Don't have pics at hand but I mounted them in place of the stock ones. They're just barely visible through the grill. Just a little more spread apart, it gives a little more distinct tone to each note. Which together I would call a nasty, ugly, dissonant sound. But it sure does get peoples attention, and I imagine that they get out of the way just to not have to hear it again. lol
How much lower? Because they come with longer flat bar sections which extends them down more. So most of the horn is visible below the top of the grill.
The Hella's are a decent replacement for an OK price. I generally remove the red covers and paint them black so they do not stick out so much, mounted in stock location.