Here is an image of what I got:
3-Gallon 250psi tank, Viair compressor, 1/2 inch hose and fitting's. (Makes for a seriously loud friggin horn!!) Wiring harness and stop relay. (The relay is very important, without it, the compressor will constantly work throughout the day and drain your battery).
I will be posting some sound clips and images of the install later this weekend, just trying to find the time to do this. Stay tuned!
Cheers!