sound mat the entire interior

try edead or fat mat.....the best stuff ever.....also.....when you go to a soundshop to get stuff installed and dynamated they will spray ruberized undercoating on some spots....like the trunk lining....you can buy that undercoating for like $3 at autozone....i used it and it worked almost as good as completely dynamatting everything.........but.....you have to make sure not to touch it for atleast a month....thats the only downside...since the ruberized stays kinda tacky....you could use the non ruberized stuff but it doesnt work as well...but still works......and you can touch it after a day or so.....just makesure everything is masked off cause its really hard to get offa surfaces that you dont want it on