I removed the rear deck and placed down some Dynomat extreme over the entire deck. I cut holes out for the deck clips and brake light wire. I had a pile of rattling from it before. Now it is awesome. It still will rattle when I run over 120db but man Dynomat makes a huge difference. It keeps sound in your car like it should be. It took a heat gun, knife, $15 for Dynomat, about 1 hour. Good luck.
