Don, Standard automotive sound proofing procedures also apply to the DeLorean. The weakest acoustical section of the DeLorean are the driver and passenger floor board area. Any application of sound conditioning materiel in this area will improve sound transmission through these thin fiberglass sections. I highly recommend Dynamat from Crutchfield, a product that is easy to install and provides as much as 3 dB or more noise reduction. This product also works well in the door roof sections above the headliners. "We're here to help you" Seasons Greetings! DMC Help / De Lorean Services / <dmchelp@xxxx> Web Site: (TEMPORARY)<www.geocities.com/dmcjoe>