ORIGINAL: autogeek13

DEI only did they on the viper 5900 and the 771 due to the fact that when installed thy can hide the satillite harness easier and away from the brain and make it look more blended with the oem harness in the vehical, because it is a security system, its meant to disable the ignition harness if broken into. And no DEI is not retarted. they are the leading manufacture in keyless,alarm,and r/s systems. they manufacture and house 90% of the systems out there. viper,clifford,avital,ready remote, python. just to name a few. and the 5900 isnt hard to install at at. just time consuming. usually takes me 3-4 hours to put on in a vehical. but then again. ill do 5 a week at work so im very familar with them.