The horn in my DD failed and I was at HF and saw horns so I got two:

http://www.harborfreight.com/automot...orn-96291.html


http://www.harborfreight.com/automot...orn-94117.html



The old fashioned one sucks. It doesn't sound right even after adjusting the nut on the back, it sounds like a contamination warning or something. It's loud and super obnoxious, if that's what you're after. I temporarily put it in my Jeep, and I'm going to keep it for an alarm siren on my garage.

The Bad Boy (bad name) is awesome. Simple wire swap, just added crip connectors for the +/- paddles and one bolt to mount it. It's really loud and has a great tone to it. Hopefully it will be durable. I'm going to put one in my Jeep too.