I'm in the market for a car alarm. I had an idea to get the viper alarm with the proximity sensor, and have the alarm make the whoop WHOOP sound that a police car makes when it pulls up behind you. I already looked and there aren't any obvious add ons that you can buy that does this. Does anybody know of a siren that is known to plug straight into a viper system?

 

Not that I know of. But viper is the best name out there in my opinion for security.

My zcame with lowjack but I can't locate the box. It's noted on the carfax.. maybe the owner removed it ?

 

which system do you have?