my high tone on my titan started going bout a year ago, went to the dealer and they couldn't duplicate it. it just kept getting worse and worse and i went back and they heard it was bad this time, and they put on 07 horns. they sound higher pitched then the originals that came on my 04 but i don't mind. this was covered by the warranty.
why pay if you can get em for free, if they go bad again get some sweet air horns