i'm writing this b/c i was thinkin of installing a material under and on the inside of my car called
http://www.quietcoat.com/ i believe that if i install this the overall sound of the motor will sound "beefier" other than rattly from the fiberglass...... also to keep the loud exhaust noise outside the car and to quiet it up a lil on the inside.....also to possibly keep the motor heat out of the cockpit (for summer time), and to help keep the heat in (in the winter) if any one used this or thought of useing it please contact me and steer me in the right direction, so it wouldn't be $500 down the drain...
thanks
Jason