Can't hear the stock horn over my pipes, so I picked up a Pro Pad Mini Beast airhorn!
Here's a comparison video
[VIDEO]http://www.youtube.com/watch?v=JlIsaijS9Wc]YouTube - Stock horn vs Pro Pad Mini Beast[/VIDEO]
Side note, this was a BITCH to install. The mounting bolts are almost tight against the carburetor for the front cylinder, and there was barely enough room to get my fingers in there. That and figuring out which wire was positive and which was negative (Thanks for not color coding Suzuki...)
Is this your truck?
[VIDEO]http://www.youtube.com/watch?v=TiWNw0A1Ijg]YouTube - Bigger than a Train Horn![/VIDEO]