Hi Tim,
I've got an aftermarket alarm on my 1985 911 carrera coupe.
It's made by Serpi Star vehicle security systems.
Features: - remote central locking
- panic mode
- bonnet push-buttons (perimetric protection)
- voltage drop
- ultrasonic sensors (volumetric protection)
- shock sensor
- optic and acoustic signals
- car check
- led memory
- enigine immobilization
- siren with internal battery
- emergency key
- siren sound type
- remote arming with closure of windows and sunroof
It works very well. I'm sure there are lots of aftermarket alarms which will fit your Porsche with the same features.
Kees.
