A couple years ago a guy was selling his low rider truck that he never finished. I bought a set of shocker hornblaster horns from him and planned on installing them on an escape I had at the time. I never got around to it and stored them in my basement. A couple months ago I came across them and started test fitting them on the car. They wouldn't fit inside the front bumper, so the only spot left was the rear bumper, and they fit perfect. I bought a 2 gallon air tank and had a friend build me a box and install the electrical. My goal for the install was to not have anything drilled in the car, and a system I could remove in 30 minutes if needed.
All four horns installed in the rear bumper and secured with 24" zip ties.

My friend built the box. Originally I was going to mount a dummy subwoofer to the box, but decided against it. The issue I had was running the 1/2" air line. There are a couple drain ports in the trunk, but none in the back. I ran the air line to one of those. I will end up drilling a hole in the back so the air line is no longer visible. It's not in the way right now, but it's an eye sore.

Inside of the box. The compressor gets hot, but not too hot. Everything is run off of a relay, and is wired to a momentary push button switch up front. I also have a toggle switch to turn the entire thing off and on.
After having these for a few weeks I love them. I prevented an accident a couple days ago when someone was about to merge on another car on the freeway. I blaster the horns and the driver got back over. I also saved my butt from some idiot about to side swipe me. I drive over 100 miles a day so these come in handy a lot. Maybe a little overkill but that's okay
All four horns installed in the rear bumper and secured with 24" zip ties.

My friend built the box. Originally I was going to mount a dummy subwoofer to the box, but decided against it. The issue I had was running the 1/2" air line. There are a couple drain ports in the trunk, but none in the back. I ran the air line to one of those. I will end up drilling a hole in the back so the air line is no longer visible. It's not in the way right now, but it's an eye sore.

Inside of the box. The compressor gets hot, but not too hot. Everything is run off of a relay, and is wired to a momentary push button switch up front. I also have a toggle switch to turn the entire thing off and on.
After having these for a few weeks I love them. I prevented an accident a couple days ago when someone was about to merge on another car on the freeway. I blaster the horns and the driver got back over. I also saved my butt from some idiot about to side swipe me. I drive over 100 miles a day so these come in handy a lot. Maybe a little overkill but that's okay