Dual Horn Alarm Upgrade
 

Here is a quick upgrade I did for my anti-theft alarm. I installed two horns in the rear trunk of my vehicle. Here is the breakdown:

2 Low Tone Alarms $25 x 2 (Princess Auto)
30cm 16 gauge wire
Electricians Pliers
Tap-In Splice Connectors
Electrical Tape

In the first pic you can see where I replaced the original horn with the first horn. You simply remove the old one and place the new one in the old one's place. In the second picture you can see where I mounted the additional horn. These horns come with a bracket that you can use, and I simply bolted it to the sheetmetal body.

The overall results are great. The alarm is incredibly loud now. I recommend this if you live in Jane & Finch (Toronto), Downtown Eastside (Vancouver) or the North End (Winnpeg). :)

Seriously though, this is a great upgrade for less than $100 and it takes about 10 minutes.