I am going to be gettin a system as one of the "interior upgrades" for my tC at somepoint after I do some performance mods to it. Anyways, I was wondering... I hear all about this rattling in the sunroof, drivers door, and hatch. When my systems "bumping" is it going to rattle a lot like my ____ty car I have now? Will the rattle be the same as without the system because the car already has it or will it worsen it significantly. What are the chances of my '06 havin the rattle? Has anyone used deadening materials in the tC, I heard they come with it in the trunk but i'm not sure if they work. Any info, suggestions, flames or anything welcome. Please if you reply know someone with a tC and a system or have one yourself.

EDIT- Also, can you replace the stock headunit with like a non lcd screen deck like the UPGRADE for the tC is?

Thankyou
Josh
(Sry if this is in the wrong forum part, I'm new)

 

My 06 sunroof rattles like a b*itch when it's fully open