sorry to ask but what is all the foil for?Doing a sealed enclosure underneathe the rear deck is more work than it's worth. You lose less space in the trunk doing a sealed or ported enclosure and firing it through the ski pass area. I have a "V" so I had to cut the ski area and trim it out. It worked flawlessly. Underneathe the rear decklid is a great place for the amps though. Below is a link to all the pics of my install. I replaced everything in the car along with the factory NAV.