Review on 🔊 Big Auto Parts 12V Single Trumpet Air Horn with Compressor - Powerful 150db Loud Sound for Trucks, Boats, SUVs, Trains (Black) by Gary Zielinski

It may not be the loudest speaker out there, but it's incredibly expensive. A trip to the hardware store and a basic general understanding of the wiring/diagrams (I found the included instructions a waste of time) is all you really need to install this horn. You really need to have adequate space as the horn is likely to be 15 inches long and will need to be accompanied by a small air compressor to function. It's a lot of fun once installed. At a concert I attended a few weeks ago, when my '05 Highlander eclipsed truck horns in the parking lot, it definitely drew attention and got a lot of laughs. All in all, it's a fun, cheap (>$50), potentially useless project that will kill an hour or two. The more modest the car, the better.