Yeah, Wolo air horn, Long Horn sound, Model 417.
$50 shipped. Installed fairly easily.
Let me say this. I was almost t-boned Sat night driving down the road...old woman wanted to drive from one shoppping center to another across the street and didn't even look...cause I have BRIGHT headlights and red car, etc...Well she wasn't going to stop until I LAID on the air horn. Never saw a jaw dro pso far and brakes hit so hard.
Hope she had to adjust her pacemaker.
A friend was in front of me about 2 car lengths ahead and heard the horn and looked for a semi in his rear view mirror.