I'm thinking about installing a sub in my 8 but will I need to bypass any factory amps? My car is a 4 year lease so anything I do to it, I would have to undo in 4 years. Anyone have any suggestions??

You don't have to remove the factory amp but you will need to tap into the line level inputs before it. Tha amp is located under the rear deck in the trunk. I would be very easy to return it to normal later.

thanks man!!