How difficult is it to install this in my car(04 si)? I know dei has the harness kits that I can just plug inline w/ the main harness then I just have to wire some there and there. on a scale of 1-10 i'm about a 7 on vehicle wiring more scared of screwing it up than actually doing it wrong makes me hesitant.
I'm not interested in the remote start feature. I'd like to be able to open the sun roof on my way out to the car to let the hot air vent.
Thanks for any advice, links, etc.

 

The alarm is a fairly easy install, say a 3 on a scale of 1-10. If you decide to go with the remote start, you will need to work around the clutch interlock and you will need a DEI 555H module to work around the immobilizer.