I have a factory alamr, most people dont go thru the trouble to steal a 15 or so year old car that only sells for 3 to 8 g's, I'd rather put money into making the car nicer or faster, I have a garage and otherwise dont leave the car out without it being locked up, and our cars aren't worth stealing the few people who would wouldnt take it because of what it is theyd take anything, basic joyriders, a facotry alarm, locked doors, etc should keep those types away. If someone wants your car, they WILL GET IT.