get some damplifier . i think it's cheaper and do the job.. secondly, there's a little rubber piece that looks like a wine bottle caps, you can turn them left / right to make it move outside a bit. So your trunk will be tight fit when you close it. I have two of those on the hondas, not sure about other cars. You can DIY and buy other material as well to damp the edges of your trunk lid to minimized the movement of the lid... now my trunk got no more rattle //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif