I bought a horn at pep boys, that claimed to sound like a "big rig horn... twice as loud" and it looks almost exactly like our stock horn... I installed it and it is a lot higher pitch than our stock horn. I am definitely not happy with that. I am taking it off tomorrow and installing an old modified "aooga" horn that is uncomfortable to listen to because it's so loud. BTW, it does not make the old "aooga" noise... just a really loud, low blast. Thanks for the help anyways everyone!