Originally Posted by mrksts
You need a stiffer trunk spring to compensate for the added weight to the trunk as well.
What will the stiffer spring do?
Originally Posted by mrksts
I'm waiting a while before doing suspension mods beyond just the sway bar I switched out (which I recommend highly)

Where did you find mods for your 04? Is it a sedan or coupe?
And I was thinking about doing audio, hooking it up to a computer that will be either in the trunk or in the front some how. I was going to try use the existing deck but I was waiting to see if I could get some further info on the stock radio.