Eastwood Thermo-Coustic Sound Deadener Material
Product Review (submitted on October 18, 2012):
So I am running basically a straight exhaust with an x pipe on my 04 mustang GT. It is extremely loud especially on the highway! So far I have only out this in my trunk but it has greatly reduced the noise! Its awesome stuff for the price! Plan on doing the front half of the car eventually. Definitely would reccomend!