Thread: Decent airhorn for the Hilux?

Hey guys,
I drive into Auckland city every day for work. Most of the time it's in heavy traffic. As a result I get a lot of pricks squeezing in front of the truck when they shouldn't and making me have to jump on the brakes (it's a bit hard to pull up a 2 tonne truck when a retard with his hat on backwards in a lowered integra pulls in front of you with a few meters to spare).

The Hilux has a pretty average horn so I'm wanting to put an airhorn in it so I can deafen the pricks if they do something like this.

All I've seen is a $50 jobbie at super cheap... but I'm imagining that'll be pretty shit. What do you guys reckon? Anyone had any experience with one?