Hey i just finished the install of a grover air horn in my truck...its pretty bitchin really loud i put the horn button under the carpet where the ebrake is so its hidden. oh yeah and its really loud. Ill post some pics when the rain stops...

 

Does it have it's own compressor?

 

Ya i mounted the horn itself under the radiator fabbed a bracket out of some angle iron and had a buddy weld it to the frame, then remote mounted the compressor, solenoid and tank on the skidplate for the transfer case

 

sounds sweet need pics as I am trying to find a spot to mount mine..... genuine old horn, gotta get ofver the price on a compressor too, there expensive for a good one, looking at the viair ones, the lowriders use them to power their air suspensions. Any one see good price on a 450c model?

 

I have a pair of twin Hadley round-bell horns (19" and 22" long) mounted to the passenger front fender, underneath the airbox (actually used the airbox mounts to anchor a bracket that holds the back of the horn, then bolted the front pedestal support directly to the inner fender liner):

http://home.earthlink.net/~tlawren349/at/air_horns.JPG
http://home.earthlink.net/~tlawren349/at/horns_2.jpg

I had a Scotty RA3 airbox when I did this, so the stock airbox mounts weren't needed. When I switched over to the Diesel Dynamics airbox (similar to an Airaid), I knocked the studs out of the airbox, reversed the bolts on the horn mounts (so the bolts are sticking up), and the airbox drops right over the bolts. A couple of wing nuts secures the airbox, and allows for quick removal.