I had a bulldog on mine, it was ok, thinking that the alarm was good but it really wasnt i tried to add some sensors to it like vibration, and audible stuff but it really didnt work, it was mainly a remote start kit, and even that didnt always work the best, i still got it off my 7.3 just never thought it being worth installing on my 6.4... just what i need more **** to go wrong