My bumper and a-spec got stollen a month ago and im finally putting it back on but what is stoping someone from doing it again =/. Is there a way to raise the sensitivity on the stock alarm system Or do i have to go with a new alarm system ?

 

I think your Best bet is doing Aftermarket Cause IDK about you but I've never even heard my Factory Alarm go off not even once. Plus you can add more Shock Sensors if you want

 

Do you kno any good brands

 

Without a doubt, you need to go Compustar if you're having issues like that. Compustar has a 2 way paging alarm system, so if someone is messing about with your car, the alarm goes off and sends a signal to your remote to start vibrating/beeping, so you can haul ass off the couch, grab the baseball bat and invoke some justice...sweet, sweet justice.

Plus they have some nice options like remote start, lojack, iPhone app...

Check it out: http://www.compustar.com/

 

Rather than go with an all new system, you can add some stuff to the factory alarm to make it better for a lot less.

Add a shock sensor to the hood latch of the car. If the car is moved or shocked at all, the shock sensor will make the car think someone pried open the hood and set off the alarm.