I got the Psychoblasters Horn Kit from Hornblasters. $309 shipped. I wanted to get the Shocker kit, but couldn't justify the price. But the one i got is LOUD. the video I posted does not do it justice at all.
It didn't come with enough air hose, so i'll be replacing it soon and routing it a better way. I have the horn wired right into the M22 fuse in the fuse box. So, when i honk the horn, it goes off. I also added in the supplied toggle switch so I can turn the horn off if necessary.

http://www.youtube.com/watch?v=_ObnRgOprAI

the horns themselves




where I mounted the horns (zip-tied to the crossmember, safe inside my RR XHD bumper, shown from underside)






you can see them peeking through the foglight hole




the compressor and tank. i want to find a new place for them, but cant really find a good place for it right now.




current routing of the air hose. it will be re-routed very soon though. going through the drain under the passenger seat, then up to the front.

 

Thats sweet man definitely want one of those!

 

That would be soooo fun at crosswalks!

 

So nice! I really want to do this with mine how are you going to mud/ water proof them?

 

That horn blows!

 

That's awesome in a messed up kinda way, now figure out how to use the air compressor to pull double duty for airing up tires...

 

Very cool, nice upgrade for the wimpy stock horn Are you worried about mud/water getting into the horn mounted there? I want to do this upgrade some day as well.

 

I have a friend who has the shocker version and if urs is nearly as loud as his is Omg! Cool mod! No more beep beep it's a jeep!

 

Man.....at that price I sure wouldn't count on those zip ties to keep them in place....

 

FRICKIN' SWEET!!!!!!!!!!!!! I HAVE GOT TO GET ONE OF THESE!!!!! To top it off, my father-in-law drives a train for the UP so he would get a huge kick out of this. Where did you find this?