I have the factory security system (keyless + alarm) in my 2000 Subaru. I have laying around a siren that was on my crx a while back. It's physically no larger then a paper clip container that you would find on your office desk. It puts out about 115 decibels and is hidden up under the dash. It is high pitched and louder then hell. So it makes for a great deterrant for anyone thiefs that would try to enter the car (unless they have ear plugs! ).
Anyway, my question is can I hook this secondary siren into my current stock security system? Would it be pulling too much away from the original siren? Any input would be great. Thanks.