Before a week ago I had never heard of installing a train air horn kit into a car.  However, it’s a very popular thing to do.  I was a little skeptical about how the horn would sound, but it actually sounds just like the real thing.  The more I researched this I found out that it was an actual train horn.  It just depends on how loud of a horn that you get.  I decided to purchase one of the most expensive ones because I wanted to really sound like a train.  And I’ve got to say that it really sounds like the real thing.