OK, so I want to upgrade my car's horn.

it will either go on the altima or pilot.

http://hornblasters.com/video.php?pic=54

Check out what is found on hornblasters.com. I actually have a set of horns, a 5 chimer as well as a single horn that broke off a 5 chimer (can't seem to find the other....)

Anyway, does anyone here have knowledge?

Look at the videos in the link. Pretty amazing.

I know these were the types of horns used on the engines on the LIRR. And if I recall correctly, on most of the GP38s, when the engineer pulled on the horn, it was not an instantaneous blast, like an on/off effect. I remember being on a few cabrides 20 years ago where the engineer would pull on the horn and depending on how hard he pulled, the air was regulated so that the sounds from the horns were somewhat variable. (Am I saying that right? Anyone catching on?)

Has anyone tried to install this on their car or can give some advice or resources? I would really appreciate it!