Here are a few photos of the project:
The air compressors are Viair's, 1 is a 450C and the big one is a 550C
1- 5 gallon thank and 1- 2.5 gallon tank, 150 psi switch.
All 5 come on when you press the horn button.
I installed a throttling valve that controls only the 3 chime set.
The Ride rites are also fed from this air source.
It is wired so that when the key is on the compressors are live.
The brackets are made to fit, due to the space limitations (I thought I would never say that with a large truck like this). Of course the "tool box" cannot store any tools any more, drag. But we have alot of fun in tunnels and over passes, needless to say that little old lady in the Gray Nissan that hesitates at a stop light doen't like me much.
A sound clip is in process.

Attached Thumbnails

     

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ