After several days of planning, measuring, making templates for aluminum mounting plates, plumbing, and wiring, I FINALLY finished installing my air horns. No more 'sick cow' under the hood. This thing sounds like a Freightliner coming up on you! Here's the web address for the Wolo Challenger kit. It includes everything you'll need...air tank compressor, hose, wiring, solenoid valve, and, as an extra bonus, a 20ft. inflater hose, so you can fill tires from the on-board compressor. Wolo model: Challenger 810 EV.
http://www.wolo-mfg.com/truck.htm

 

nice setup. me personally I am going to be going with this badboy...

http://www.hornblasters.com/products...train-horn-kit

 

Forgot to mention.....don't let the $500 price tag scare you....that's mfg. list.
I got the kit on Amazon for $174 delivered!

 

Looks good, but, you may have a problem 'packaging' it. I worked with all the dimensions provided by Wolo, and started measuring. I even found a coffee can that approximated the air tank size, and used it to check for fit.

 

Can you post a recording? The studio sounds of the Wolo site aren't getting me...

 

I'm not sure how to post sounds, but the website gives you the actual tone. Everybody has different speakers/amplifiers on their computer, so there's really no way to duplicate what it sounds like live. Let's just say, when I was all finished, and finally pushed the button, I was quite amazed! Naturally, the wife started getting on me about the neighbor kid taking his nap

 

Recovery21 has train horns. That truck is nasty.

 

Those are illegal in a lot of states. Besides, the train horns need a pretty big air tank, and the horn setup is usually 4 trumpets vs 2. Not a whole lotta room in an Alpha engine compartment.

 

Well ya thats true.. but those train horns are nassssty! And they engage with the alaram after a few mins too.

 

It would take some extra planning but I am sure you could mount each horn in different spots given enough hose and pressure in the lines. I might go with the clown car style 2 horns just because its a little easier to do, alot cheaper and just sounds funny. I used to love turning heads in my pathfinder with it because it wasn't that it was loud it was just weird and was great.