call up airlift and ask for sue or jeremy, tell em nate sent ya

or call suicide doors and ask for dave, and tell em larstrak from subsonic sent ya

ask for everything you need with a train horn.
i have a viair 380, 5 gal tank, ride control support bags, and train horns.
i mounted my compressor on the driver side inside C-channel frame behind the rear wheel, and i removed the spare tire and mounted my 5 gallon in place of it, with the horns themselves mounted on the horizontal side-side crossmember just in front of the rear bumper.
ps: it's fuckin loud, and i love it. i live in a college town (MSU) so there's always plenty of fresh meat to scare the shit out of. best idea i've ever had. and you can DEFINITELY still hear it on the highway