dude use what you must but dont layer the intire inside of your car . instead use a tuning fork to find dead spots in the car and place your tar paper there. if the fork gets louder its a dead spot.natural harmonic balance . louder spl
i cant find a good ground any where.my power wire runs on one side of the frame.and my ground is on that side of the frame(could that be the problem)becuase i cant get a good ground in the trunk either.its a 91 linc. towncar:confused: