is it possible to replace the stock horn?
it sounds like a yapping chihuahua.
Your search skills must have been a "FAIL" also as there are about 20 threads on it. You must have a 2010 as they put real horns on 2011's and up.
Here's a good thread alot of people including me followed.........http://www.toyota-4runner.org/5th-gen-t4rs/59265-new-fiamm-horn-install.html
But do a search on "horn" in the 5th Gen section as there are plenty more!
I want a horn that sounds like gunshots! bet people will GTFO in a hurry!
my 2012 te has a much "hornier" horn