ohh sorry i wasn't clear. the noise are from the outside.. inside is fine

btw when i hold the lic. plate it still rattles i thnk its the actual bumper....
so basically i need to insolate the whole rear end coz of that... i heard dynamat cost hella $$.. well any other way i can do this or thats about it? and another thing would the spoiler have anything to do with it? (oem spoiler)